> ## Content Index > Fetch the complete content index at: https://www.flavorist.com/llms.txt > Use this file to discover other available public pages before exploring further. # Important Sulfur-containing Flavor Compounds for Meat Flavors - Part 3 - URL: https://www.flavorist.com/importan-sulfur-containing-flavor-compounds-for-meat-flavors-part-3/ - Published: 2026-02-04T22:44:54.000Z - Updated: 2026-02-05T01:43:29.000Z - Author: Editor ## **FEMA #3146:** 2,2′‑(Dithiodimethylene)‑difuran ## Here’s a **comprehensive flavor profile** for **FEMA #3146**, covering its identity, sensory attributes, typical uses in flavors, and guideline application/dosage details. ### **Substance Overview** **Name & Identifiers** - **Primary name:** *2,2′‑(Dithiodimethylene)‑difuran* - **Other names / synonyms:** • *Difurfuryl disulfide* • *Furfuryl disulfide* • *Bis(2‑furfuryl) disulfide* - **CAS number:** *4437‑20‑1* - **Molecular formula:** *C₁₀H₁₀O₂S₂* - **Molecular weight:** \~226.32 g/mol - **JECFA number:** **1081** - **Regulatory:** FEMA GRAS Reference **3146** (generally recognized as safe for intended flavor use) It is a **sulfur‑containing heterocyclic compound** and part of the family of furanyl disulfides that are important in **thermal and roasted aroma chemistry**. --- ### **Occurrence** *Difurfuryl disulfide* is primarily recognized as a **synthetic flavoring ingredient**, although compounds of this class are also formed in foods through **Maillard reaction and thermal processing of carbohydrate and protein precursors**. It has been reported as a **volatile component in roasted coffee and cooked/baked foods**, contributing to overall aroma complexity. --- ### **Flavor & Sensory Description** **Sensory / Odor Profile** At very low concentrations, this compound delivers a **complex savory and roast character**: - **Primary descriptors:** • **Coffee**, **roasted**, **meaty** • **Sulfurous**, **onion‑like**, **savory** - **Secondary nuances:** • Vegetable‑like aspects (e.g., cabbage) and dark savory facets at some levels Overall, the sensory impact is **rich, roasted, slightly sulfurous, and savory**, helping to impart *thermal and cooked food impressions* in flavor systems. --- ### **Functional Role in Flavors** *FEMA #3146* (*difurfuryl disulfide*) is a **potent flavor modifier** used to enhance depth, roast complexity, and savory realism in diverse food and beverage applications. It is almost always used in combination with other aroma chemicals to build balanced profiles. **Typical Functional Uses** - **Coffee, espresso, and roast beverages:** adds authentic *roasted coffee* depth - **Meat & savory flavors:** contributes *cooked/meaty* and *grilled/roasted* nuances - **Soups & broths:** reinforces umami and *savory backbone* - **Onion / cooked vegetables:** enhances savory alliaceous impressions - **Roasted snacks & baked goods:** supports *toasted and warm bready* notes Because of its strong flavor impact, it serves best as an **accent ingredient**, elevating existing roast/savory characteristics rather than acting as a primary note. --- ### **Usage Levels & Dosage Guidance** *Difurfuryl disulfide* is **very potent** with a low sensory threshold. Typical *starting use levels* in flavor formulation (before dilution into a finished product) are low and require sensory tuning: **Approximate Starting Points** *(Expressed as ppm in a flavor concentrate — finished food usage will be much lower once diluted)* - **Coffee & roasted beverage flavors:** \~0.01 – 1 ppm - **Savory / meat flavors:** \~0.01 – 0.5 ppm - **Vegetable / onion accents:** \~0.01 – 0.3 ppm - **Broth & stock bases:** \~0.01 – 0.5 ppm These are **guideline ranges** for initial formulation; iterative sensory evaluation and adjustment are essential because small changes in organosulfur components can dramatically shift overall character. --- ### **Safety & Regulatory Notes** - Listed on the **FEMA GRAS** list (FEMA 3146), indicating *generally recognized as safe* for use at flavoring levels under good manufacturing practice. - Included in JECFA evaluations (No. 1081), supporting safety for intended use as a flavor ingredient. - Sulfur heterocycles like this are potent and strongly odorous in concentrated form — appropriate laboratory handling (ventilation, PPE) is recommended during formulation. --- ### **Summary Table** | **Aspect** | **Detail** | | ---------------------- | ---------------------------------------------------------------- | | **Substance** | *2,2′‑(Dithiodimethylene)‑difuran* | | **FEMA Number** | 3146 | | **CAS Number** | 4437‑20‑1 | | **JECFA Number** | 1081 | | **Chemical Class** | Sulfur‐containing furanyl disulfide | | **Flavor Profile** | Coffee, roasted, meaty, savory, sulfurous; onion/cabbage nuances | | **Functional Uses** | Coffee/roast, savory/meat, soups, cooked vegetables | | **Typical Use Levels** | \~0.01–1 ppm (flavor concentrate) | | **Occurrence** | Synthetic; related to roast compounds in foods | | **Regulatory Status** | FEMA GRAS; JECFA evaluated | --- ## **FEMA #3787:** 2‑Methyl‑3‑tetrahydrofuranthiol ## Here’s a **comprehensive profile** for **FEMA #3787** — including its chemical identity, occurrence, sensory notes, flavor applications, and guideline usage information. ### **Substance Overview** **Name & Identifiers** - **Primary name:** *2‑Methyl‑3‑tetrahydrofuranthiol* - **Synonyms:** • 2‑Methyltetrahydrofuran‑3‑thiol • Tetrahydro‑2‑methyl‑3‑furanthiol • 3‑Mercapto‑2‑methyltetrahydrofuran - **CAS Number:** *57124‑87‑5* - **Molecular formula:** C₅H₁₀OS - **Molecular weight:** \~118.19 g/mol - **JECFA Number:** **1090** - **Regulatory:** FEMA GRAS Reference Number **3787** **Regulatory Status** - Listed on the **FEMA GRAS** list, meaning it is considered *generally recognized as safe* for use as a flavoring substance under intended conditions of use. A JECFA safety evaluation (No. 1090) supports its use as a flavor ingredient. --- ### **Occurrence** - *2‑Methyl‑3‑tetrahydrofuranthiol* is predominantly used as a **synthetic flavoring ingredient**. Its structure and volatility place it in the class of **organosulfur thiols** that are often found in very low concentrations in cooked and heat‑processed foods formed via thermal reactions of precursors. - It is especially relevant in *sulfur‑rich aroma chemistry*, which is common in **meats and savory foods** — though direct reports of its natural occurrence in specific foods are limited, compounds of this family are known thermal aroma constituents. --- ### **Flavor & Sensory Description** **Sensory / Organoleptic Profile** - **Primary descriptors:** *Meaty*, *sulfury*, *savory*, *onion/chive‑like.* - At low concentrations, this compound contributes **authentic cooked meat and roasted notes**, with nuances reminiscent of *green onion, chive, or garlic‑like* sulfur character in flavor systems. - Because it is a **thiol (mercaptan)**, it has a **very low odor threshold** and thus a strong aromatic impact even at trace levels. Symrise describes its importance especially in **beef flavor applications**, where it adds naturalness and body. It also can be useful at lower levels in **dairy flavors** to give depth without overpowering the profile. --- ### **Functional Role in Flavors** *2‑Methyl‑3‑tetrahydrofuranthiol* is used by flavorists as a **high‑impact savory and roast modifier**. Its role is typically *accent* or *enhancer*, blending with other components to build rich, meaty, and roasted profiles. **Common Application Uses** - **Meat & Beef Flavors:** Provides characteristic *meaty, roasted, grilled* notes and enhances overall savory richness. Widely cited as essential in beef flavor profiles. - **Other Meat Types:** Useful in chicken, pork, and lamb flavors to support thermal/roasted character. - **Seasonings & Snack Profiles:** Accentuates savory, roasted, and onion‑like notes in seasoning blends. - **Dairy & Complex Savory Systems:** At lower use levels, can enhance *body* and *depth* in cheese, butter, and other dairy‑derived flavors without dominating. Its contribution is akin to other **sulfur‑containing thiols**, which are key to making *cooked*, *roasted*, and *savory* impressions realistic when combined with base flavor compounds. --- ### **Usage Levels & Dosage Guidance** *2‑Methyl‑3‑tetrahydrofuranthiol* is **very potent** and is used at *very low concentrations* in flavor formulations. Usage depends on the specific application and target character, but typical guidance includes: **Typical Formulation Ranges (guideline starting points)** *(Concentrations refer to the level in *finished product use*, not pure concentrate.)* - **Beef & Meat Flavors:** \~1 ppb to \~5 ppm — very low due to high potency. - **Other Meat/Savory Profiles:** \~0.1 ppm to \~2 ppm — used to build cooked/roast nuances. - **Seasonings & Sauces:** \~0.1 ppm to \~1 ppm — supports savory and onion/chive nuances. - **Dairy Enhancements:** Usually lower end of the range (ppb to low ppm) to avoid overt sulfur character. > **Note:** These ranges are **starting points**. Actual use levels should be tailored with sensory evaluation in your specific formulation because small changes in sulfur compounds can produce large sensory effects. --- ### **Safety & Regulatory Notes** - As a **FEMA GRAS** listed substance with an associated **JECFA evaluation (1090)**, this compound is considered *safe for use as a flavoring* when used in accordance with good manufacturing practice and typical flavor use levels. - Organosulfur thiols like this one are typically **highly aromatic and potent**, so formulations should be tested in sensory panels, and concentrated material should be handled with appropriate ventilation and protective measures. --- ### **Summary Table** | **Aspect** | **Detail** | | --------------- | --------------------------------- | | **Substance** | *2‑Methyl‑3‑tetrahydrofuranthiol* | | **FEMA Number** | 3787 | | **CAS Number** | 57124‑87‑5 | | ---------------------- | ---------------------------------------------------------------------- | | **JECFA Number** | 1090 | | **Chemical Class** | Organosulfur thiol | | **Flavor Profile** | Meaty, sulfury, savory, onion/chive nuances | | **Functional Uses** | Beef/meat flavors, seasonings, savory modifiers, dairy depth | | **Typical Use Levels** | ppb to low ppm (application dependent) | | **Occurrence** | Synthetic flavor ingredient, analogous to cooked food sulfur chemistry | | **Regulatory Status** | FEMA GRAS; JECFA evaluated | --- ## **FEMA #3270:** *Spiro(2,4‑dithia‑1‑methyl‑8‑oxabicyclo(3.3.0)octane‑3,3′‑(1′‑oxa‑2‑methyl)cyclopentane)* ## Here’s a **detailed profile for FEMA #3270** — covering its identity, occurrence, sensory descriptors, typical flavor applications, usage/dosage guidance, and regulatory context. ### **Substance Overview** **Name & Identifiers** - **FEMA Name:** *Spiro(2,4‑dithia‑1‑methyl‑8‑oxabicyclo(3.3.0)octane‑3,3′‑(1′‑oxa‑2‑methyl)cyclopentane)* **Synonyms:** - 2′,3‑Dimethyl‑3′,4‑dioxa‑2,8‑dithiabicyclo(3.3.0)octane spirocyclopentane - Hexahydro‑2′,3a‑dimethylspiro\[1,3‑dithiolo\[4,5‑b\]furan‑2,3′(2′H)‑furan\] - **CAS Number:** *38325‑25‑6* - **JECFA Number:** **1296** - **Molecular formula:** C₁₀H₁₆O₂S₂ - **Chemical class:** Organosulfur spirocyclic compound (sulfur‑heterocycle) - **FEMA Status:** Listed as a **flavoring agent** (FEMA GRAS) > **Note:** This is a *synthetic* flavoring substance — structurally unique due to its spirocyclic ring and sulfur atoms. --- ### **Occurrence & Source** - **Natural vs. Synthetic:** Unlike many simple aroma volatiles, FEMA #3270 is **synthetic** and typically manufactured for use in flavor formulations. While structurally related sulfur heterocycles can be formed in cooked and thermally processed foods via Maillard and sulfur‑associated reactions, the *spiro* bicyclic compound itself is supplied industrially rather than isolated as a common natural food component. --- ### **Flavor & Sensory Characteristics** ### **Sensory / Odor Profile** According to FEMA’s own flavor library: - **Primary descriptor:** *Savory* Additional sensory insights (from compilations of organosulfur compound properties and predictive aroma software) suggest typical impressions include: - **Meaty / beefy** - **Sulfurous** - **Roasted / cooked** - **Onion‑like / alliaceous** - **Nutty / savory depth** These descriptors align with general sensory characteristics of sulfur‑rich bicyclic compounds used to evoke *cooked meat* and *rich savory* profiles in flavor systems. **Key sensory impression:** ➡️ **Meaty, savory, cooked/beef‑like notes** — particularly useful as an accent in complex savory formulations. --- ### **Functional Role in Flavor Formulations** *FEMA #3270* is used by professional flavorists as a **specialty savory flavoring ingredient** that enhances *meaty, roasted, and cooked* character. Its role is not typically to provide a primary recognizable note alone, but rather to **enrich and deepen overall savory profiles**, especially in combination with other aroma chemicals. ### **Common Application Areas** - **Meat & beef flavors:** supports *authentic cooked meat* nuances in beef, steak, roast applications. - **Savory bases / broths:** adds depth to soups, stocks, and bouillon flavor profiles. - **Roasted meat and poultry:** enhances cooked/grilled impressions. - **Seasonings & spice blends:** can contribute subtle *meaty & sulfurous complexity* in savory snacks and sauces. > Due to its complex structure and sulfur content, it is typically **used as an accent/modifier** rather than as a dominant flavor note. --- ### **Usage Levels & Dosage Guidance** Detailed **industry usage levels** for specific FEMA ingredients are often proprietary. However, given the **potency of complex organosulfur flavor chemicals**, use is generally at **very low concentrations** in flavor blends. As a guideline: ### **Typical Starting Usage Ranges** (in flavor concentrates, before dilution into final products) *(These are suggestions based on typical organosulfur potency and professional flavorist practice — exact levels vary by formulation and sensory goal.)* - **Meat & beef flavors:** \~0.01 – 1 ppm equivalent in finished food - **Savory broths / stocks:** \~0.05 – 1 ppm - **Seasonings & sauces:** \~0.05 – 0.5 ppm 👉 Because *organosulfur compounds* are **highly potent and low‑threshold**, even sub‑ppm changes can significantly alter aroma; careful sensory evaluation and titration are essential. --- ### **Safety & Regulatory Considerations** - **FEMA GRAS:** Included in the FEMA GRAS list for use as a flavoring agent, indicating it is considered *generally recognized as safe* for use in food at levels consistent with good manufacturing practice. - **JECFA Evaluation:** Assessed by JECFA (No. 1296) with no safety concerns at current use levels in food. - Typical safety assessments consider: - Estimated intake from use levels - Toxicological data and thresholds - Exposure relative to safety margins — and have concluded *no safety concern at current levels of intake* when used as a flavoring. As with many **concentrated flavoring substances**, appropriate handling (ventilation and PPE) is recommended in formulation labs due to strong odor and potency. --- ### **Summary Table** | **Aspect** | **Detail** | | --------------- | ------------------------------------------------------------------------------------------ | | **Substance** | *Spiro(2,4‑dithia‑1‑methyl‑8‑oxabicyclo(3.3.0)octane‑3,3′‑(1′‑oxa‑2′‑methyl)cyclopentane)* | | **FEMA Number** | 3270 | | **CAS Number** | 38325‑25‑6 | | ---------------------- | ---------------------------------------- | | **JECFA Number** | 1296 | | **Chemical Class** | Organosulfur spirocyclic compound | | **Flavor Profile** | Savory, meaty, cooked/roasted, sulfurous | | **Functional Uses** | Meats, broths, savory bases, seasonings | | **Typical Use Levels** | \~0.01–1 ppm (guideline) | | **Occurrence** | Synthetic (used in flavor formulations) | | **Regulatory** | FEMA GRAS; JECFA evaluated | --- ## **FEMA #3323:** *2‑Thienyl disulfide* ## Here’s a **detailed profile** for the flavoring substance **FEMA #3323**. ### **Substance Overview** **Name & Identifiers** - **Primary name:** *2‑Thienyl disulfide* (also written *bis(2‑thienyl) disulfide* / *2,2′‑dithiobis(thio­phene)*). - **Synonyms:** 2‑Thiophen‑2‑yldisulfanylthiophene, di‑2‑thienyl disulfide. - **CAS Number:** *6911‑51‑9* - **JECFA Number:** **1053** - **Molecular formula:** C₈H₆S₄ - **Regulatory:** FEMA GRAS Reference **3323** — recognized for use as a flavoring agent by the FEMA Expert Panel. **Regulatory Status** - Evaluated by the **FEMA Expert Panel** and listed as *generally recognized as safe (GRAS)* under conditions of intended use as a flavor ingredient. - Also evaluated by the **Joint FAO/WHO Expert Committee on Food Additives (JECFA)** in Food Additives Series No. 50, supporting safety at intake levels typical in flavor use. --- ### **Occurrence** - *2‑Thienyl disulfide* is a **synthetic organosulfur compound**, used specifically as a flavor ingredient. - Heterocyclic sulfur compounds structurally related to thienyl disulfides are known to arise in the **thermal processing of foods** (e.g., cooked meats, roasted products), but this specific disulfide is manufactured rather than isolated from foods. --- ### **Flavor & Sensory Description** **Sensory / Organoleptic Profile** According to chemical and flavor databases: - **Primary flavor/odor descriptors:** 🔹 *Earthy* and *rubbery* aroma. 🔹 *Mushroom‑like* and *meaty* nuances are often noted when evaluated at dilution. – These descriptors stem from sensory reports where the compound at \~0.10 % in propylene glycol exhibited a **rubbery, earthy, mushroom profile**. - The *earthy/meaty* character can lend depth and rustic nuance in savory or cooked food impressions. **Odor / Flavor Character** - Earthy and roasted meat–like nuances. - Rubber and mushroom overtones at higher concentrations. - Typically not described as fruity or sweet; its impact is **savory‑oriented** rather than sweet or floral. --- ### **Functional Role in Flavor Formulations** *2‑Thienyl disulfide* is used as a **specialty savory flavor ingredient** — not a primary note — but to **accent or enhance earthy, meaty, and roasted character** in certain complex food flavor systems. **Typical Applications** - **Savory & Meat Flavors:** Helps build *earthy/meaty accents* in beef, lamb, poultry, and other cooked meat profiles. - **Broths & Stocks:** Adds depth that complements *broth and stock bases* where cooked and roasted notes are desired. - **Mushroom / Earthy Accents:** Can lend *earthy or mushroom‑like nuances* useful in certain vegetable or umami blends. - **Seasonings / Snack Flavors:** Small amounts can enrich *savory seasoning mixes* or roasted snack profiles. Because *2‑thienyl disulfide* is a **potent heterocyclic sulfur compound**, it’s typically blended with other aroma chemicals — such as pyrazines, thiols, thioethers, and carbonyls — to build balanced savory or cooked profiles. --- ### **Usage Levels & Dosage Guidance** Precise industry usage data is often proprietary, but organosulfur heterocycles like 2‑thienyl disulfide are **very potent with low odor thresholds**, and are therefore used at **very low concentrations** in flavor concentrates. **Guideline Starting Ranges** *(in flavor concentrate before dilution into finished food product)* - **Savory/meat profiles:** \~0.01‑0.5 ppm - **Broth & stock bases:** \~0.01‑0.3 ppm - **Earthy or mushroom accents:** \~0.005‑0.2 ppm > These are **starting points for sensory evaluation** — actual use levels should be adjusted by trained flavorists based on matrix and sensory goals. Sulfur heterocycles can rapidly shift overall character if overdosed. Broad regulatory guidance from the industry suggests typical use levels for many stable flavor heterocycles in the range of **0.1–2 mg/kg finished food** (≈0.1–2 ppm), although exact values depend on application and sensory threshold. --- ### **Safety & Regulatory Considerations** - **FEMA GRAS:** Recognized as safe for use as a flavor ingredient when used in compliance with good manufacturing practice. - **JECFA Evaluation:** Included under JECFA No. 1053 with a safety assessment supporting its use in flavors. - Toxicology data from rodent studies show that intake levels typical of flavor use result in large margins of safety, indicating **no safety concern** at intended levels of use. - As with many **sulfur heterocyclic compounds**, concentrated material is strongly odorous and formulation should be handled with appropriate ventilation and PPE in laboratory settings. --- ### **Summary Table** | **Aspect** | **Detail** | | --------------- | --------------------- | | **Substance** | *2‑Thienyl disulfide* | | **FEMA Number** | 3323 | | **CAS Number** | 6911‑51‑9 | | ---------------------- | ---------------------------------------------------- | | **JECFA Number** | 1053 | | **Chemical Class** | Organosulfur heterocycle (disulfide) | | **Flavor Profile** | Earthy, rubbery, mushroom, meaty | | **Functional Uses** | Savory/meat accents, broths, earthy/mushroom nuances | | **Typical Use Levels** | \~0.005–0.5 ppm (guideline) | | **Occurrence** | Synthetic (used in flavor formulations) | | **Regulatory Status** | FEMA GRAS; JECFA evaluated | --- ## **FEMA #3062:** *2‑Thienyl mercaptan* ## Here’s a detailed **flavor profile** for **FEMA #3062**, covering its identity, occurrence, sensory descriptors, typical flavoring applications, and guideline usage/dosage. ### **Substance Overview** **Name & Identifiers** - **Primary name:** *2‑Thienyl mercaptan* - **Other names / synonyms:** 2‑mercaptothiophene; thiophene‑2‑thiol - **CAS Number:** *7774‑74‑5* - **Molecular formula:** C₄H₄S₂ - **Molecular weight:** \~116.21 g/mol - **JECFA Number:** **1052** - **Regulatory:** FEMA GRAS Reference **3062** (Flavoring ingredient recognized as safe) --- ### **Occurrence** - *2‑Thienyl mercaptan* is a **synthetic flavoring agent** manufactured for use in food and beverage flavor systems. - While specific reports of its natural occurrence are limited, many **thiophene and thiol derivatives** (the chemical family it belongs to) are formed during thermal processing of foods such as **roasted coffee and cooked meats** and contribute to sulfurous and roasted aroma notes. --- ### **Flavor & Sensory Description** **Sensory / Odor Character** - Listed organoleptic descriptors include **coffee** aroma, indicating a contribution to **roasted/roast‑related sensory profiles**. - Supplier data describe *2‑thienyl mercaptan* (as food‑grade) with **caramel, coffee, and roasted notes**. **General Character Notes** - **Primary notes:** Roasted, coffee‑like, caramel, sulfur‑accented at low levels - **Impact trait:** Potent, low‑threshold — typical of mercaptans/thiols contributing *roasty, sulfurous depth*. This sensory character makes it useful in blends where a rich **roasted or grilled nuance** is desirable — particularly in **coffee, brown, and savory profiles**. --- ### **Functional Role in Flavors** *2‑Thienyl mercaptan* is primarily used as a **high‑impact accent ingredient** in flavor formulations to enhance or modify roast‑related sensory impressions. **Typical Application Areas** - **Coffee & Espresso Flavors:** Enhances *authentic roasted coffee character*, adding depth and complexity. - **Roasted Nuts & Brown Notes:** Used in brown, toasted, or roasted nut profiles to lift richer roast nuances. - **Savory & Meat Flavors:** May be used in meat or broth systems where subtle roasted or grilled elements are needed. - **Smoke / Grilled Accents:** Can support *smoky or grilled impressions* in combination with other sulfur heterocycles. Because of its **potency and sulfurous character**, it is typically not the dominant note but rather serves as an **accent/modifier** that blends with other aroma chemicals (e.g., pyrazines, thiols, thioethers, sulfur furans) to build balanced sensory profiles. --- ### **Usage Levels & Dosage Guidance** Precise formulation ranges for specific FEMA ingredients are often proprietary, but the flavor industry uses guidelines based on **sensory potency and threshold** typical of sulfur thiols: **Typical Starting Usage Ranges** *(in flavor concentrate — before dilution into finished food product)* - **Coffee / Roast Profiles:** \~0.01–1 ppm - **Roasted Nut / Brown Accents:** \~0.01–0.5 ppm - **Savory / Brothy Enhancers:** \~0.005–0.3 ppm - **Smoky / Grilled Modifiers:** \~0.005–0.2 ppm > Because thiols and mercaptans have *very low odor thresholds*, even **parts‑per‑billion to low parts‑per‑million** levels can significantly influence the overall aroma. Sensory panel evaluation and iterative adjustment are standard practice to fine‑tune final formulation. --- ### **Safety & Regulatory Considerations** - *2‑Thienyl mercaptan* is listed on the **FEMA GRAS** list for use as a flavoring agent consistent with **good manufacturing practices**. - It has been evaluated by JECFA (No. 1052) under safety assessments of thiophene derivatives, supporting its safe use at typical flavoring levels. - As with many concentrated **thiol/mercaptan compounds**, it has a strong odor and should be handled with appropriate ventilation and personal protective equipment (PPE) during formulation work. --- ### **Summary Table** | **Aspect** | **Detail** | | --------------- | --------------------- | | **Substance** | *2‑Thienyl mercaptan* | | **FEMA Number** | 3062 | | **CAS Number** | 7774‑74‑5 | | ---------------------- | ----------------------------------------------------------------- | | **JECFA Number** | 1052 | | **Chemical Class** | Sulfur heterocycle (thiol) | | **Flavor Profile** | Coffee, roasted, caramel, grilled nuances | | **Functional Uses** | Coffee, roast, brown, savory accents | | **Typical Use Levels** | \~0.005–1 ppm (guideline) | | **Occurrence** | Synthetic; thienyl thiol family common in roasted aroma chemistry | | **Regulatory Status** | FEMA GRAS; JECFA evaluated | --- ### **In Practical Formulation** - In coffee flavor systems, *2‑thienyl mercaptan* helps strengthen **roast depth and body**, especially when used with pyrazines and sulfur furans. - In savory or smoke‑accent flavors, it contributes a *grounded, roasted character* that supports the perception of meatiness or grilled notes without being overtly overtaking the blend. --- ## **FEMA #3345:** *2‑Ethylthiophenol* ## Here’s a **comprehensive profile** for **FEMA #3345** covering its identity, occurrence (where known), sensory descriptors, applications in flavor systems, and typical use/dosage guidance. ### **Substance Overview** **Name & Identifiers** - **Primary name:** *2‑Ethylthiophenol* **Synonyms:** • *2‑Ethyl‑benzenethiol* • *2‑Ethylphenyl mercaptan* - **CAS Number:** *4500‑58‑7* - **Molecular formula:** C₈H₁₀S (implied from CAS and formula for ethylthiophenol class) - **Molecular weight:** \~138.23 g/mol - **JECFA Number:** **529** - **Regulatory:** FEMA GRAS Reference **3345** — recognized for use as a flavoring substance. --- ### **Occurrence** - **Synthetic flavoring ingredient:** *2‑Ethylthiophenol* is manufactured for use in flavorings and is **not generally reported as a major natural food constituent**. It belongs to the class of **thiophenol (aryl mercaptan) sulfur compounds** used in savory or specific aroma modifications. - **Related chemistry:** Organosulfur thiols and thiophenol derivatives are structural relatives of compounds that can be generated in foods during heating/roasting reactions (e.g., Maillard/thermal pathways in roasted meats and coffee), but this specific compound is typically added purposefully rather than directly extracted from foods. (General flavor chemistry context) --- ### **Flavor & Sensory Description** **Sensory / Odor Profile** - According to FEMA’s flavor library, the substance is associated with **savory character**. - As a **thiol/aryl mercaptan**, its sensory profile is expected to include:*Thiols and mercaptans are generally potent odorants even at ppb levels, contributing strong character to savory, roasted, or cooked‑food profiles.* - **Sulfurous and savory notes** - **Meaty/roasted impressions** - Possible **earthy or grilled nuances** at ultra‑low concentrations (typical of thiol/thiophenol family compounds) > **Note:** Precise published sensory descriptors for 2‑ethylthiophenol in flavor use (e.g., “cooked meat” vs “smoky”) are limited in public databases, but its classification as *savory* indicates it contributes to **depth and roast nuances** rather than sweet or fruity notes. --- ### **Functional Role in Flavor Formulations** *2‑Ethylthiophenol* is used as a **specialty, high‑impact flavor ingredient** to enhance or modify **savory, roasted and cooked nuances** in complex flavor systems — particularly where a sulfuraceous backbone adds realism. **Typical Applications** - **Savory Meat Flavors:** Enhances *beef, lamb, pork, or grilled meat profiles* by contributing *roasted/savory depth*. - **Broths, Stocks & Umami Systems:** Adds subtle *heat/cooked complexity* that supports full‑bodied savory notes. - **Alliaceous or Cooked Vegetable Profiles:** At low doses can assist the *roasted, cooked vegetable/meat bridge* in blends (e.g., onion, mushroom, garlic elements). - **Seasonings & Snack Flavors:** Boosts *umami and roasted accents* in chips, seasonings, sauces, and spice blends. Because compounds in this class are **very potent and sulfur‑rich**, they are usually used as **accent/modifier notes** rather than primary contributors; they are blended with other heterocyclic, carbonyl, or pyrazine components to create balanced flavors. --- ### **Usage Levels & Dosage Guidance** Because *2‑ethylthiophenol* is **potent with a low odor threshold**, usage levels in flavor concentrates are generally **very low**. Exact industry usage data is often proprietary, but typical **flavorist guideline ranges** can be outlined as starting points for formulation: **Approximate Starting Usage Ranges** *(Expressed in ppm in a flavor concentrate — final food usage will be much lower after dilution)* - **Savory / Meat Profiles:** \~ 0.01 – 0.5 ppm - **Broths & Stocks:** \~ 0.005 – 0.3 ppm - **Alliaceous / Cooked Veg Accents:** \~ 0.005 – 0.2 ppm - **Seasonings & Sauce Enhancers:** \~ 0.005 – 0.2 ppm > **Important:** These are **guideline starting points** for flavor development. Sensory evaluation and matrix‑specific tuning are essential, as even slight increases in sulfur‑containing compounds can produce large sensory shifts. --- ### **Safety & Regulatory Notes** - **FEMA GRAS:** Listed as a generally recognized as safe flavoring ingredient (FEMA #3345), indicating expertise consensus on safety at flavor use levels. - **JECFA Review:** Included in JECFA evaluation No. 529, which reviews safety of certain food additives and contaminants, including sulfur flavor compounds, at intended use levels. - **Handling:** As with many sulfur thiol/mercaptan chemicals, concentrated material is **strongly odorous** and should be handled with appropriate PPE and ventilation in formulation labs. --- ### **Summary Table** | **Aspect** | **Detail** | | --------------- | ------------------- | | **Substance** | *2‑Ethylthiophenol* | | **FEMA Number** | 3345 | | **CAS Number** | 4500‑58‑7 | | ---------------------- | --------------------------------------------------- | | **JECFA Number** | 529 | | **Chemical Class** | Organosulfur thiol/thiophenol | | **Flavor Profile** | Savory, sulfur‑rich, roasted/cooked nuances | | **Functional Uses** | Meat, broths, savory bases, cooked vegetable blends | | **Typical Use Levels** | \~0.005 – 0.5 ppm (guideline) | | **Occurrence** | Synthetic flavoring ingredient | | **Regulatory Status** | FEMA GRAS; JECFA evaluated | --- ### **Practical Notes for Formulators** - In **meat flavors**, *2‑ethylthiophenol* enhances grilled/roasted depth when combined with other sulfur heterocycles (e.g., thiols, disulfides) and roasted pyrazines. - In **broth/stock profiles**, it can reinforce savory body when used sparingly with glutamate or yeast extract notes. - In **savory snacks**, it rounds roasted elements, particularly in seasoning blends with roasted onion/garlic and smoked accents. --- ## **FEMA #3616: Benzenethiol** Here’s a **comprehensive profile** for **FEMA #3616 (Benzenethiol)** — including name/identifiers, occurrence, sensory descriptors, typical flavor applications, usage guidance, and regulatory information. ### **Substance Overview** **Name & Identifiers** - **FEMA Number:** **3616** - **Primary name:** **Benzenethiol** - **Also known as / Synonyms:** *Thiophenol*, *Mercaptobenzene* - **CAS Number:** **108‑98‑5** - **JECFA Number:** **525** - **FDA / CFR:** Listed under **21 CFR 172.515** for flavor use - **Chemical class:** Aromatic **thiol/mercaptan** (organosulfur) compound > As a thiol, benzenethiol has a sulfur‑based functional group (–SH) attached to a benzene ring, giving it characteristic aroma properties. --- ### **Occurrence** - *Benzenethiol* is generally used as a **synthetic flavoring ingredient** rather than being commonly isolated from foods. - Compounds in the thiol/mercaptan family can be generated in trace amounts in some heat‑processed foods via Maillard and sulfur chemistry, but benzenethiol itself is mainly added purposefully in flavor systems for its aroma contribution. --- ### **Flavor & Sensory Description** **Sensory / Odor Characteristics** - **Primary descriptor:** *Penetrating* aroma - Thiols such as benzenethiol are very **potent and low‑threshold** odorants. - While the official FEMA library lists only “penetrating,” organosulfur compounds of this class are generally **rich, sulfurous, roasted, and savory** in character — similar to other aromatic mercaptans used as specialty flavor modifiers. > In flavor chemistry, thiols often evoke *cooked/matured, grilled, roasted, or savory* impressions even at very low concentrations, due to their strong sensory impact. --- ### **Functional Role in Flavor Formulations** *FEMA #3616* (benzenethiol) is used as a **high‑impact flavor modifier** to enhance depth, roasted/savory nuance, or complexity in certain flavor systems. Because it is **very potent**, it’s not typically used as a dominant note but as a **substantiating accent** that contributes characteristic sulfur‑rich backbone or roast nuance. **Typical Applications** - **Savory / Meat Flavors:** Enhances *richness and roasted/savory depth* in beef, lamb, or grilled meat profiles. - **Broths, Stocks & Gravy Bases:** Adds *depth and complexity* to umami‑driven systems where cooked notes are desired. - **Brown / Roast Profiles:** Can contribute to *roasted or toasted impressions* in baked goods, seasonings, or roast‑accent products. - **Specialty Blends:** Used as an accent modifier in nuanced formulations requiring a strong *sulfurous‑savory dimension*, particularly when balanced with pyrazines and other heterocycles. Because benzenethiol’s aroma impact is strong and sulfuraceous, flavorists use it in tiny amounts paired with other complementary components (e.g., roasted aldehydes, sulfides, thiols) to achieve a balanced sensory profile. --- ### **Usage Levels & Dosage Guidance** *Benzenethiol* is **extremely potent and low‑threshold**, so usage guidance in flavor formulations is generally at **very low concentrations**. **Flavorist Guideline (starting points)** *(Concentrations refer to levels *in flavor concentrate formulations*, not finished food levels)* - **Savory/meat modifiers:** \~0.01 – 0.5 ppm - **Brothy/stock enhancers:** \~0.01 – 0.3 ppm - **Roasted/brown nuances:** \~0.005 – 0.2 ppm > These levels are **starting points for sensory evaluation** and need iterative titration. Sulfur‑based aromatics can rapidly shift overall character if overdosed; precise adjustment with sensory panels is essential. --- ### **Safety & Regulatory Considerations** - **FEMA GRAS:** Listed as *Generally Recognized As Safe* for use as a flavoring agent by the FEMA Expert Panel. - **JECFA Safety Evaluation:** Included in **JECFA 525** for safety assessment, indicating no safety concern at intended use levels in flavoring. - **FDA:** Recognized under 21 CFR 172.515 as a safe flavoring agent when used according to good manufacturing practice. - As with many concentrated **thiols/mercaptans**, benzenethiol has a strong odor and should be handled with appropriate ventilation and protective equipment during formulation work. --- ### **Summary Table** | **Aspect** | **Detail** | | --------------- | ---------------------------------------------------- | | **Substance** | *Benzenethiol* (also *thiophenol / mercaptobenzene*) | | **FEMA Number** | 3616 | | **CAS Number** | 108‑98‑5 | | ---------------------- | ------------------------------------------------------- | | **JECFA Number** | 525 | | **Chemical Class** | Aromatic thiol (mercaptan) | | **Flavor Profile** | Penetrating; sulfurous, savory/roast‑accent in blends | | **Functional Uses** | Meat/savory depth, broths/stocks, roasted/brown accents | | **Typical Use Levels** | \~0.005 – 0.5 ppm (formulation guidance) | | **Occurrence** | Synthetic flavoring ingredient | | **Regulatory Status** | FEMA GRAS; JECFA evaluated; FDA recognized | --- ### **Practical Notes for Flavor Development** - In **meat, broth, or grilled flavor systems**, adding *trace benzenethiol* can enhance realism by contributing *roasted and savory depth* when balanced with aldehydes and pyrazines. - In **baked or brown sugar systems**, it may serve to underlie roast‑accent impressions without dominating. --- ### **FEMA #2147:** *Benzyl mercaptan* ### Here’s a **comprehensive profile** for **FEMA #2147 (Benzyl Mercaptan)** — including its identity, occurrences, sensory notes, how it’s used in flavor systems, guideline usage levels, and regulatory context. ### **Substance Overview** **Name & Identifiers** - **FEMA Number:** **2147** — assigned to *Benzyl mercaptan* in the FEMA GRAS flavor list. - **Primary name:** **Benzyl mercaptan** **Synonyms:** • *Phenylmethyl mercaptan* • *Thiophenol, benzyl‑* (sometimes used unofficially) - **CAS Number:** **100‑53‑8** - **JECFA Number:** **526** - **FDA Regulation:** Listed under **21 CFR 172.515** for flavoring use. - **Chemical class:** An **aromatic mercaptan (thiol)** — a sulfur‑containing compound featuring a benzyl group attached to an ‑SH (mercaptan) function. --- ### **Occurrence** - *Benzyl mercaptan* is primarily used as a **synthetic flavoring ingredient** rather than being extracted directly from foods. - Compounds in the mercaptan/thiol family — including benzyl mercaptan — can be **present at trace levels in heated or cooked foods** due to sulfur chemistry and amino acid transformations, though benzyl mercaptan specifically is used as an added flavor component. (inferred from general mercaptan behavior) --- ### **Flavor & Sensory Description** **Sensory / Odor Profile** - According to FEMA’s flavor library, *Benzyl mercaptan* is described with a primary **“savory”** flavor character. - Aromatic mercaptans are known for **potent sulfurous and roast‑related sensations** even at low concentrations, contributing depth, roast richness, or meaty background notes in complex flavor systems. > Mercaptans, in general, often provide robust **savory, roasted, grilled, and cooked meat‑like nuances** in flavor formulations because the sulfur component amplifies typical “cooked food” impressions. --- ### **Functional Role in Flavor Applications** *Benzyl mercaptan* is used by flavorists as a **modifier or accent ingredient** — not usually as a main note, but to enhance depth, warmth, and roasted character in savory and cooked food flavors. **Typical Application Areas** - **Savory/Meat Flavors:** Enhances *cooked, roasted, or grilled meat nuances*. - **Broth, Stock & Umami Bases:** Contributes *body and depth* alongside umami components. - **Roasted & Brown Notes:** Adds complexity in roasted or toasted flavor profiles. - **Seasonings & Snack Flavors:** Supports *savory, roasted accents* in seasoning mixes. Because *benzyl mercaptan* is **potent and sulfur‑rich**, it is blended with other aroma chemicals (e.g., aldehydes, pyrazines, thioethers) to create nuanced and balanced overall profiles. --- ### **Usage Levels & Dosage Guidance** Precise industry usage data is often proprietary, but as with many **organosulfur thiols**, *Benzyl mercaptan* is used at **very low concentrations** due to its **low odor threshold** and strong sensory impact. **Typical Flavorist Guideline (starting points)** *(Values refer to concentration in flavor concentrate before dilution into final food product)* - **Savory / Meat Enhancements:** \~0.01 – 0.5 ppm - **Broth & Stock Depth:** \~0.005 – 0.3 ppm - **Roasted/Brown Notes:** \~0.005 – 0.2 ppm > These are **starting points for formulation and sensory evaluation**; iterative sensory adjustment is essential because sulfur compounds easily dominate at small increases. --- ### **Safety & Regulatory Context** - **FEMA GRAS Listing:** *Benzyl mercaptan* is included on the FEMA **Generally Recognized As Safe** list for use as a flavoring ingredient. - **JECFA Evaluation:** Reviewed under **JECFA Number 526**, indicating evaluation in the Joint FAO/WHO expert committee series with no safety concerns at typical use levels. - **FDA Regulation:** Recognized under **21 CFR 172.515** for use as a flavoring agent consistent with good manufacturing practice. - **Handling:** As with many mercaptans, the **concentrated chemical is strongly odorous** and should be handled with proper ventilation and protective equipment in formulation labs. --- ### **Summary Table** | **Aspect** | **Detail** | | --------------- | ------------------ | | **Substance** | *Benzyl mercaptan* | | **FEMA Number** | **2147** | | **CAS Number** | **100‑53‑8** | | ---------------------- | ------------------------------------------ | | **JECFA Number** | **526** | | **Chemical Class** | Aromatic mercaptan (thiol) | | **Flavor Profile** | Savory, sulfurous; adds roast/meat depth | | **Functional Uses** | Savory/meat, broth/stock, roasted profiles | | **Typical Use Levels** | \~0.005 – 0.5 ppm (guideline) | | **Occurrence** | Synthetic, used in flavor formulations | | **Regulatory Status** | FEMA GRAS; JECFA evaluated; FDA listed | --- ### **Practical Notes for Flavorists** - In **savory formulations**, benzyl mercaptan can help replicate *authentic cooked meat or roast cues* that enhance the overall depth of profile. - In **complex seasoning blends**, even trace amounts help round out *sulfury and umami‑like* facets when paired with taste enhancers and roasted aldehydes. --- ## **FEMA #3240: o‑Toluenethiol** Here’s a **complete flavor profile** for **FEMA #3240** (o‑Toluenethiol), including its identity, occurrence, sensory characteristics, functional uses, typical application guidance, and safety/regulatory context. ### **Substance Overview** **Name & Identifiers** - **Primary name:** **o‑Toluenethiol** (also *2‑methylbenzenethiol*, *o‑thiocresol*) - **Synonyms:** • 2‑Methylbenzenethiol • o‑Thiocresol • 2‑Methylthiophenol - **FEMA Number:** **3240** - **CAS Number:** **137‑06‑4** - **JECFA Number:** **528** - **Chemical class:** **Aromatic thiol (organosulfur)** — a benzene ring with a thiol (-SH) and methyl group. **Regulatory Status** - Listed in the **FEMA GRAS Flavor Ingredient Library** with a savory designation. - Evaluated by **JECFA (No. 528)** in WHO Food Additives Series. --- ### **Occurrence** - *o‑Toluenethiol* is a **synthetic flavoring agent** used to impart specific aroma characteristics and is manufactured for use in food flavor systems. - While thiols can be generated through thermal reactions in food (e.g., roasting or Maillard chemistry), this specific compound is **primarily used as an added flavor ingredient** rather than directly extracted from everyday foods. (General organosulfur chemistry context) --- ### **Flavor & Sensory Description** **Organoleptic / Sensory Profile** - The FEMA flavor library categorizes o‑Toluenethiol as **savory in character**. - Commercial and analytical sources describe its **organoleptic profile** as **meaty, sulfurous**, and **bacon‑like**, consistent with aromatic thiols — strong, roast‑related notes typical of mercaptan classes. **Typical Descriptors** - **Primary:** *Meaty*, *savory*, *sulfurous* - **Secondary influences:** *Bacon*, *brothy*, *roasted* - Due to the **thiol/mercaptan functional group**, the odor/taste is **potent and low‑threshold**, meaning relatively small amounts can significantly affect aroma. --- ### **Functional Role in Flavor Formulations** *o‑Toluenethiol* serves as a **high‑impact flavor accent** used by flavorists to **enhance savory, cooked, and roasted impressions** in food flavor systems. Because thiols are potent, they are typically used in small amounts and often blended with complementary compounds to shape balanced flavor profiles. **Typical Applications** - **Savory/meat flavors:** Enhances *roasted, grilled, or cooked meat* profiles, adding depth and roast complexity. - **Broths & stocks:** Contributes *savory richness and body* in meat and vegetable broths. - **Roasted snack and seasoning blends:** Adds *roasted/bacon‑like accents* when combined with other volatiles like pyrazines and carbonyls. - **Brown/umami profiles:** Supports *umami and roast depth* in complex culinary flavor builds. Because of its **strong sulfur character**, it is not usually the dominant note but rather acts as an **accent modifier** to heighten realism in **savory and roasted flavor constructs**. --- ### **Usage Levels & Dosage Guidance** Detailed industry usage levels are typically proprietary, but in practice *o‑Toluenethiol* is used at **very low concentrations** due to its **low odor threshold** and strong impact. **Guideline Starting Points** *(Concentrations refer to flavor concentrate levels before dilution into finished food)* - **Savory/meat profiles:** \~0.01–0.5 ppm - **Broths and stocks:** \~0.005–0.3 ppm - **Roasted snacks & seasonings:** \~0.005–0.2 ppm > These are **starting points** for sensory evaluation; iterative testing is essential, as even small changes in thiol compounds can dramatically alter overall aroma. --- ### **Safety & Handling** - As a **FEMA GRAS** flavor ingredient, o‑Toluenethiol is considered safe for use in flavor formulations consistent with good manufacturing practice. - It has a low odor threshold and can be **strongly odorous and irritating** at higher concentrations, so **protective measures** (e.g., ventilation, gloves, eye protection) are recommended during formulation work. (General thiol handling practice) - Thiols can sometimes be associated with irritation or strong sensory reactions, so careful handling and concentration control are standard practice. --- ### **Summary Table** | **Aspect** | **Detail** | | --------------- | ----------------------------------------------------- | | **Substance** | *o‑Toluenethiol* (2‑methylbenzenethiol, o‑thiocresol) | | **FEMA Number** | 3240 | | **CAS Number** | 137‑06‑4 | | ---------------------- | ----------------------------------------------------------- | | **JECFA Number** | 528 | | **Chemical Class** | Aromatic thiol/mercaptan | | **Flavor Profile** | Meaty, savory, sulfurous (bacon‑like) | | **Functional Uses** | Meat/savory accents, broth depth, roasted/roast snack notes | | **Typical Use Levels** | \~0.005–0.5 ppm (guideline) | | **Occurrence** | Synthetic (used in flavor systems) | | **Regulatory Status** | FEMA GRAS; JECFA evaluated | --- ## **FEMA #3232: 2‑Pyridinemethanethiol** Here’s a **comprehensive profile** for **FEMA #3232** — including its identity, occurrence/structure, sensory descriptors, typical flavor applications, guideline usage/dosage, and regulatory context. ### **Substance Overview** **Name & Identifiers** - **FEMA Number:** **3232** — included on the FEMA Flavor Ingredient GRAS list. - **Preferred Name:** **2‑Pyridinemethanethiol** - **Synonyms / Other Names:** *2‑Pyridinyl methane thiol* (alternate systematic form) - **CAS Number:** **2044‑73‑7** - **JECFA Number:** **1308** (evaluated in WHO Food Additives Series No. 54) - **Chemical Class:** Organosulfur thiol (a pyridine ring with an –CH₂–SH side chain). **Regulatory:** - Listed as *Generally Recognized as Safe* (GRAS) by the FEMA Expert Panel for use as a flavor ingredient under conditions of intended use — with a JECFA review on file. --- ### **Occurrence & Structural Context** - *2‑Pyridinemethanethiol* is a **synthetic flavor ingredient** manufactured for use in food flavor systems; it’s not typically isolated as a major natural constituent from foods. - Structurally, it combines a **pyridine heterocycle** (which can impart *savory/bitter/umami* nuances) with a **thiol (mercaptan) group**, which tends to generate strong **sulfurous, cooked, or savory notes** in aroma chemistry. --- ### **Flavor & Sensory Description** **Sensory / Organoleptic Profile** - According to the FEMA Flavor Library, this compound is described as **“savory.”** - Organosulfur thiols like this typically contribute **intense, low‑threshold savory and cooked/meaty attributes** when formulated at appropriate levels. - Expected organoleptic character (based on chemical family and structure): - **Savory** and **meaty** impressions - **Sulfur‑rich** nuances with possible roasted or umami complexity - Subtle **pyridine‑associated nuances** that can add depth or *bouquet* in complex savory profiles > Thiols/mercaptans often exert strong sensory impact even at trace levels due to their **very low perception thresholds**. --- ### **Functional Uses in Flavors** *2‑Pyridinemethanethiol* is typically used as a **specialty accent/modifier ingredient** in complex flavor builds, particularly where rich, savory, or cooked impressions are desired: **Typical Application Areas** - **Meat & Savory Flavors:** Used to **enhance *cooked meat* or *rich umami* impressions** in beef, pork, poultry, or game flavor systems. - **Broth / Stock Bases:** Contributes *depth and savory complexity* in bouillon, gravy, and stock profiles. - **Cooked Vegetable / Soups:** Can support *savory roasted vegetable* nuances in soup or sauce flavors. - **Roast / Grilled Accents:** Adds *thermal/cooked* cues in roast/grilled profiles when paired with other aroma building blocks. Because it’s a **potent thiol**, it is not typically a primary note but used to **boost realism and complexity** in savory and thermal impressions when combined with other heterocycles, aldehydes, and roast compounds. --- ### **Usage Levels & Dosage Guidance** Detailed use levels for specific FEMA substances are proprietary, but thiols and organosulfur compounds of this type are **formulated at very low concentrations** due to their potency. **Typical Flavorist Guideline Ranges** *(in flavor concentrate before dilution into final food products)* - **Savory/Meat Enhancers:** \~0.01–1 ppm (starting point) - **Broths & Stocks:** \~0.01–0.5 ppm - **Cooked/Grilled Accents:** \~0.005–0.3 ppm > These ranges are **guideline starting points**; actual formulation requires **iterative sensory evaluation** because small changes in thiol levels can dramatically affect overall aroma balance. --- ### **Safety & Regulatory Context** - **FEMA GRAS:** Listed by the FEMA Expert Panel as GRAS for flavor use, indicating a general consensus on safety at intended use levels. - **JECFA Evaluation (No. 1308):** Included in the FAO/WHO evaluation of certain food additives and flavoring agents, with safety conclusions appropriate for flavor use. - As with many **mercaptan/thiol chemicals**, concentrated forms have **strong odors** and should be handled with adequate laboratory ventilation and PPE during formulation. --- ### **Summary Table — FEMA #3232: 2‑Pyridinemethanethiol** | **Aspect** | **Detail** | | --------------- | ------------------------ | | **Substance** | *2‑Pyridinemethanethiol* | | **FEMA Number** | 3232 | | **Synonyms** | 2‑Pyridinyl methane thiol | | ---------------------- | --------------------------------------------------- | | **CAS Number** | 2044‑73‑7 | | **JECFA Number** | 1308 | | **Chemical Class** | Organosulfur thiol with heterocycle | | **Flavor Profile** | Savory, sulfur‑rich, meaty/cooked cues | | **Functional Uses** | Meat/savory enhancers, broths, cooked/roast accents | | **Typical Use Levels** | \~0.005–1 ppm (guideline) | | **Occurrence** | Synthetic flavor ingredient | | **Regulatory Status** | FEMA GRAS; JECFA evaluated | --- ### **Practical Notes for Flavors** - **Use in savory meat builds:** Small additions can impart *authentic cooked meat and umami depth* when blended with other roast and heterocyclic notes. - **Balanced spotlight:** Combine with **pyrazines, thiophenes, and cooked vegetable notes** for fuller, rounded savory profiles.