Essential Synthetic Flavor Compounds Every Flavorist Must Know

Editor

07 Mar 2026 • 9 min read

Thousands of synthetic flavor compounds have been approved for use in foods and flavors, yet no flavorist would—or could—use them all. This list features 128 key flavor compounds that John Wright, in his book Flavor Creation, recommends every flavorist should know and work with.

isoamyl alcohol
cis-3-hexenol
1-octen-3-ol
cis-6-nonen-1-ol
acetaldehyde
isovaleraldehyde
hexanal
octanal
decanal
trans-2-hexenal
trans-2-nonenal
trans-2,cis-6-nonadienal
trans-2, trans-4-decadienal
2-heptanone
2-octen-4-one
diacetyl
acetyl methyl carbinol
acetic acid
butyric acid
2-methyl butyric acid
3-methyk butyric acid or isovaleric acid
caproic acid
caprylic acid
capric acid
lauric acid
2-methyl-2-pentenoic acid
cis-3-hexenoic acid
ethyl acetate
ethyl butyrate
ethyl 2 methyl butyrate
ethyl 3 methyl butyrate
ethyl hexanoate
isopropyl acetate
isobutyl acetate
isoamyl acetate
isoamyl butyrate
ethyl acrylate or ethyl 2-propenoate
ethyl cis-4 octanoate
ethyl trans-2, cis-4-decadienoate
allyl hexanoate
cis-3-hexenyl acetate
cis-3-hexenyl butyrate
methane thiol or methyl mercaptan
dimethyl sulfide
3-(methylthio) propanal
methyl thiobutyrate
methyl 3-methylthiopropionate
3-methylcyclopentane-1,2-dione
methyl jasmonate
linalool
citronellol
geraniol
nerol
alpha-terpineol
menthol
citronellal
citral
alpha-ionone
beta-ionone
laevo-carvone
alpha-damascene
beta-demascone
damascenone
nootkatone
neryl acetate
geranyl acetate
citronellyl acetate
linalyl acetate
isobornyl acetate
4-mentha-8-thiol-3-one
para-menth-1-ene-8-thiol
myrcene
valencene
1,8-cineole
neryl oxide
linalool oxide
2-phenyl ethanol
benzaldehyde
4(4-hydroxy phenyl)-2-butanone
2-phenyl acetic acid
methyl phenyl acetate
methyl para-tert-butyl phenyl acetate
dimethyl benzyl carbinyl butyrate
methyl cinnamate
2,6-dimethyl phenol
guaiacol or 2-methoxy phenol
2,6-dimethoxy phenol
eugenol
methyl anthranilate
vanillin
ethyl vanillin
anethole
anisaldehyde
heliotropine
gamma-hexalactone
gamma-nonalactone
gamma-decalactone
gamma-undecalactone
gamma-octalactone
gamma-decalactone
gamma-dodecalactone
1,15-pentadecalactone or exaltolide
ambrettolide
5-methylfurfural
2-acetylfurfural
theaspirane
2-methyl tetrahydro furan-3-one
2-furan mmethane thiol or furfuryl mercaptan
2-methyl 3-tetrahydrofuran thiol
difurfuryl sulfide
maltol
ethyl maltol
indole
2,3-dimethyl pyrazine
trimethyl pyrazine
tetramethyl pyrazine
2-acetyl pyrazine
2-methoxy-3-methyl pyrazine
2-methoxy 3-ethyl pyrazine
2-methoxy 3-isobutyl pyrazine
2-isopropyl 4-methyl thiazole
2-isobutyl thiazole
pyridine
2-acetyl pyridine
2,4,5-trimethyl oxazole
trithioacetone

Here is a grouping of the compounds based on their primary flavor characteristics, along with their specific flavor notes and common applications.

Fruity & Estery

This group is characterized by sweet, ripe, and often juicy sensations, primarily driven by esters and some lactones.

Isoamyl alcohol: Fused oil, alcoholic, fruity in dilution. Used in banana flavors and as a solvent.
Ethyl acetate: Nail polish remover, ethereal, pineapple. Used as a general fruit solvent and in berry flavors.
Ethyl butyrate: Juicy fruit, pineapple, orange. Ubiquitous in fruit candy and beverage flavors.
Ethyl 2 methyl butyrate: Green apple, fruity, sweet. Key component in apple and berry flavors.
Ethyl 3 methyl butyrate: Fruity, sweet, reminiscent of blueberry. Used in berry and tutti-frutti blends.
Ethyl hexanoate: Fruity, winey, banana-pineapple. Used in apple, banana, and fermented fruit applications.
Isopropyl acetate: Fruity, solvent-like, reminiscent of raspberry. Used in fruit flavors and printing inks.
Isobutyl acetate: Fruity, solventy, primarily peach and pear. Used in pear drops and fruity candies.
Isoamyl acetate: Intense banana, pear. The classic "banana runts" flavor.
Isoamyl butyrate: Fruity, sweet, apricot and pear. Adds body to fruit punches.
Allyl hexanoate: Sweet, fruity, distinct pineapple. The primary character impact for pineapple candy.
Ethyl acrylate: Harsh, fruity, plastic. Used cautiously for raw fruit top notes.
Ethyl cis-4 octanoate: Fruity, apricot, cognac-like. Used in stone fruit and brandy flavors.
Neryl acetate: Fruity, floral (rose), citrus. Bridges floral and fruity profiles in perfumery.
Methyl cinnamate: Fruity, strawberry, balsamic. Used in strawberry flavors and chewing gum.
Gamma-hexalactone: Sweet, herbal, coumarinic, tobacco. Used in hay, tonka, and sweet fruit nuances.
Gamma-octalactone: Coconut, fruity, creamy. The backbone of coconut flavors and dairy creams.
Gamma-nonalactone: Coconut, milky, peach. Known as "aldehyde C-18" despite being a lactone; used in peach and coconut.
Gamma-decalactone: Intense peach, fatty. The primary peach lactone.
Gamma-undecalactone: Peach, apricot, creamy. Often labeled "aldehyde C-14" for peach flavors.
Gamma-dodecalactone: Fruity, citrus, tuberose. Used in peach, citrus, and heavy florals.
1,15-pentadecalactone: Musk, fruity, metallic. A synthetic musk used in fine fragrances.
Ambettolide: Sweet, musky, floral, ambrette seed. A macrocyclic musk used in high-end perfumery.
Methyl anthranilate: Fruity, grape, citrus. The signature compound for Concord grape flavor.
Ethyl trans-2, cis-4-decadienoate: Fruity, pear, apple, green. This is actually the single most important character impact compound for Bartlett pears. It is distinct from the aldehyde version listed under fatty notes.
Ethyl acrylate: (I listed it, but I want to ensure the flavor note is specific) Harsh, fruity, plastic, pineapple. Used for raw fruit top notes.
Ethyl 2-propenoate: (This is simply the IUPAC name for Ethyl acrylate, so it is the same compound).

Green & Grassy

These compounds evoke the scent of cut grass, leaves, and fresh vegetation.

cis-3-Hexenol: Freshly cut grass, leafy. Used universally to impart freshness in flavors and fragrances.
Hexanal: Green, grassy, unripe fruit. Used for "green top notes" in apple and vegetable flavors.
trans-2-Hexenal: Sharp green, apple skin, leafy. More piercing than the alcohol, used for apple and tomato leaf.
cis-3-Hexenyl acetate: Fruity-green, pear, banana leaf. Softer and slightly sweeter than the alcohol.
cis-3-Hexenyl butyrate: Waxy-green, fruity, melon. Adds a sweet, green depth to cucumber and melon.

Mushroom, Earthy & Fungal

Defined by earthy, damp soil, and mushroom-like qualities.

1-Octen-3-ol: Mushroom, earthy, fungal. The primary aroma compound of mushrooms.
2-Octen-4-one: Mushroom, earthy, hay-like. Similar to the alcohol but with a slightly metallic edge.
cis-6-Nonen-1-ol: Waxy, melon, but also intense mushroom-like in trace amounts. Used in cucumber and melon.

Fatty, Waxy & Aldehydic

This group consists of compounds that taste like fat, oil, and the waxy peel of fruits, often with a "soapy" character.

Octanal: Waxy, citrusy, orange peel. Used in orange flavors and as a modifier.
Decanal: Powerful, waxy, floral (orange peel). A key top note in many citrus fragrances and flavors.
trans-2-Nonenal: Fatty, orris, cucumber, cardboard. The compound responsible for the "old book" or aged beer smell.
trans-2, trans-4-Decadienal: Deep fried, fatty, citrus, chicken fat. The key aroma in frying oil and potato chips.
Caproic acid: Pungent, sweaty, cheesy. Used in cheese and nut flavors.
Caprylic acid: Oily, fatty, slightly cheesy. Adds body to dairy flavors.
Capric acid: Unpleasant, rancid, waxy in high conc.; soapy in dilution. Used in dairy and fruit blends.
Lauric acid: Fatty, metallic, bay oil. Used in coconut and floral notes.

Cucumber & Melon

These compounds have a distinct watery, fresh, rindy character associated with melons.

trans-2,cis-6-Nonadienal: Powerful cucumber, violet leaf. The key cucumber aldehyde.
2,6-Nonadien-1-ol (related): (implied, though not listed) but the aldehyde is the key impact.
3-(methylthio)propanal: Cooked potato, savory, but also contributes to melon rind. Known as Methional.

Nutty, Roasted & Grain-like

These notes are formed via Maillard reactions and pyrazine chemistry.

2,3-Dimethyl pyrazine: Nutty, peanut, cocoa. Used in roasted peanut flavors.
Trimethyl pyrazine: Nutty, roasted, potato, cocoa. Found in coffee and roasted nuts.
Tetramethyl pyrazine: Musty, coffee, cocoa. Slightly more earthy than the lower alkyl pyrazines.
2-Acetyl pyrazine: Popcorn, nutty, toasted bread. The classic "microwave popcorn" aroma.
2-Methoxy-3-methyl pyrazine: Bell pepper, earthy, nutty. One of the most potent aroma compounds.
2-Methoxy-3-ethyl pyrazine: Earthy, raw potato, nutty. Used in vegetable flavors.
2-Methoxy-3-isobutyl pyrazine: Intense green bell pepper, earthy. Signature bell pepper compound.
2-Acetyl pyridine: Popcorn, bread crust, nutty. Used in baked goods and coffee flavors.
2-Acetylfurfural: Sweet, nutty, caramel, bready. Adds a baked note to flavors.
5-Methylfurfural: Sweet, spicy, caramel, almond-like. Found in maple syrup and caramel.
2-Methyl tetrahydro furan-3-one: Sweet, nutty, bready, coffee. Adds a roasted sugar note.
Theaspirane: Fruity, woody, tea-like, naphthyl. Contributes to the complex aroma of tea and some fruits.

Cheesy & Buttery

These are primarily acids and carbonyls that provide dairy depth.

Acetic acid: Pungent, sour, vinegar. Used for sharpness.
Butyric acid: Rancid butter, vomit in high conc., cheesy in low. Essential for butter and cheese flavors.
2-methyl butyric acid: Fruity, cheesy, sweaty. Adds complexity to strawberry and cheese.
3-methyl butyric acid / isovaleric acid: Sweaty, cheesy, rancid. Used in aged cheese and nut flavors.
2-methyl-2-pentenoic acid: Fruity, but also contributes to the lactone-like note in strawberries.
cis-3-Hexenoic acid: Fruity, buttery, pineapple, passionfruit. Bridges green and dairy.
Diacetyl: Intense butter, butterscotch. The classic artificial butter flavor for popcorn.
Acetyl methyl carbinol (Acetoin): Creamy, buttery, yoghurt. Used as a butter enhancer and in dairy cultures.
Maltol: Sweet, cotton candy, caramel, jammy. Used as a flavor enhancer and in strawberry.
Ethyl maltol: Intensely sweet, fruity, caramelized sugar. Much more potent than maltol.

Citrus & Fruity (Terpenes)

Compounds derived from terpenes that are the backbone of citrus and herbal notes.

Linalool: Floral, citrus (bergamot), sweet. Ubiquitous in all citrus and floral bouquets.
Citronellol: Rosy, citrus, geranium. Used in rose and citrus blends.
Geraniol: Sweet rose, floral, fruity (peach). The core of many rose bases.
Nerol: Sweet rose, refreshing citrus. Softer and fresher than geraniol.
alpha-Terpineol: Lilac, pine, citrus. Used in floral and pine fragrances.
Menthol: Cooling, minty, peppermint. Used for cooling effect in oral care and confectionary.
Citronellal: Citrus, lemony, citronella. Used in insect repellent and lemon flavors.
Citral: Intense lemon, citrus. A mixture of neral and geranial; key for lemon flavor.
alpha-Ionone: Woody, violet, raspberry. Used to bridge floral and berry notes.
beta-Ionone: Woody, floral (violet), raspberry, seaweed. Key in violet and berry complexes.
Laevo-Carvone: Sweet, spearmint. The main character of spearmint.
alpha-Damascene: Fruity, woody, rose. A trace compound with huge impact in florals.
beta-Damascone: Fruity, rose, apple, plum. Used to add "jammy" depth to fruit flavors.
Damascenone: Floral, rose, fruity, baked apple. Adds naturalness to fruit and floral blends.
Nootkatone: Grapefruit, citrus, bitter. The key aroma of grapefruit peel.
Myrcene: Pleasant, sweet, balsamic, resinous. Used in citrus and spice flavors.
Valencene: Sweet, fresh citrus, orange peel. The key compound for orange flavor.
Neryl oxide: Green, citrus, floral, naphthyl. Found in petitgrain and adds lift to citrus.
Linalool oxide: Woody, earthy, floral. Contributes to the complexity of tea and lavender.
Geranyl acetate: Floral, lavender, rose, fruity. Used in floral bouquets and citrus accents.
Neryl acetate: Floral, fruity (raspberry), rose.
Citronellyl acetate: Fruity, floral, rosy. Adds freshness to citrus and floral.
Linalyl acetate: Floral, fruity, bergamot, lavender. The main ester in lavender oil.
Isobornyl acetate: Piney, herbal, balsamic. Used in pine fragrances and some spice blends.

Minty & Herbal

Cooling, fresh, and medicinal notes.

Menthol: (Already listed above).
Laevo-Carvone: (Already listed above).
1,8-Cineole (Eucalyptol): Cooling, medicinal, eucalyptus, camphoraceous. Used in cough drops and mint blends.
Anethole: Sweet, anise, licorice. The primary flavor of anise and fennel.
Anisaldehyde: Sweet, powdery, anise, hawthorn. Softer than anethole, used in soap perfumery.

Floral & Sweet

Phenethyl alcohol and its derivatives, plus some balsamics.

2-Phenyl ethanol: Rose, honey, floral. The signature compound for rose water.
2-Phenyl acetic acid: Sweet, honey, rose. Adds a honey-like undertone to florals.
Methyl phenyl acetate: Sweet, honey, jasmine, tobacco. Intensely honey-like.
Methyl para-tert-butyl phenyl acetate: Floral, fruity, clean, muguet (lily of the valley). Known as "Lilial" (though usage is now restricted).
Dimethyl benzyl carbinyl butyrate: Floral, fruity, apricot, tea-like. Adds a unique floral-fruity lift.

Spicy & Phenolic

Warm, aromatic notes reminiscent of spices and smoke.

Eugenol: Spicy, clove, woody. The main compound in clove oil.
Methyl eugenol: Spicy, earthy, mild clove, carnation.
Methyl isoeugenol: Sweet, spicy, delicate clove.
2,6-Dimethyl phenol: Smoky, phenolic, medicinal. Used in smoke flavors.
Guaiacol: Smoky, phenolic, vanilla-like in high dilution. Used for smoky and "burnt" notes.
2,6-Dimethoxy phenol: Smoky, woody, bacon-like. Key to smoked meat flavors.
2-Furan methanethiol (Furfuryl mercaptan): Roasted coffee, smoky, meaty. Intensely potent for coffee and meat.
2-Methyl 3-tetrahydrofuran thiol: Meaty, roasted, coffee, sulfurous. Key to meaty flavors.
Difurfuryl sulfide: Sulfurous, burnt, coffee, meaty. Adds depth to savory flavors.

Sulfurous & Tropical

Sharp, pungent, and often associated with tropical fruits due to sulfur compounds.

Methane thiol (Methyl mercaptan): Pungent, rotten cabbage, sulfurous. Used in cheese and coffee in tiny amounts.
Dimethyl sulfide: Canned corn, tomato, asparagus, sulfurous. Key to many cooked vegetable flavors.
Methyl thiobutyrate: Sulfurous, fruity, cheesy. Adds a tropical, catty nuance.
Methyl 3-methylthiopropionate: Sulfurous, fruity, pineapple, melon. Important for tropical fruits.
4-Mentha-8-thiol-3-one: Tropical, blackcurrant, catty, grapefruit. The key "catty" note in blackcurrant.
para-Menth-1-ene-8-thiol: Grapefruit, tropical, sulfurous. One of the most potent aroma chemicals, giving grapefruit its character.
2-Isobutyl thiazole: Green, tomato leaf, grassy, nutty. Key impact for tomato vine.

Vanilla & Balsamic

Sweet, creamy, and resinous.

Vanillin: Sweet, creamy, vanilla. The standard vanilla flavor.
Ethyl vanillin: Intensely sweet, vanilla, creamy. Much stronger than vanillin, used in confectionary.
Heliotropine (Piperonal): Sweet, floral, heliotrope, vanilla, cherry. Used in floral perfumery and cherry flavors.
Methyl jasmonate: Floral, jasmine, herbal, fruity. Adds a natural jasmine character.
Ethyl 2,4-decadienoate: Fruity, pear, but also balsamic. (Ethyl trans-2, cis-4-decadienoate) is the key pear ester.

Nutty & Caramel

Sweet, cooked, and browned notes.

Maltol: (Listed in Cheesy/Buttery but fits here too).
Ethyl Maltol: (Listed in Cheesy/Buttery).
Cyclotene (3-methylcyclopentane-1,2-dione): Sweet, maple, caramel, licorice. Found in maple syrup and fenugreek.
2,4,5-Trimethyl oxazole: Nutty, green, earthy, cocoa. Adds a roasted note.
Trithioacetone: Sulfurous, fruity, nutty, passion fruit. The key "passion fruit" compound.
Indole: Floral, naphthyl, mothball in high conc., jasmine in low. Used in jasmine and orange blossom.

Floral, Fruity, and Woody (Ketones)

4-(4-hydroxy phenyl)-2-butanone (Raspberry Ketone): Sweet, fruity, raspberry. The key raspberry note, though it requires other modifiers to be true to life.

Miscellaneous & Specialty

Pyridine: Pungent, nauseating, fishy. Used in coffee and cocoa traces.
Benzaldehyde: Sweet, almond, cherry. The primary cherry/almond flavor.
2-Isobutyl-4-methyl thiazole: (Not listed, but implied by analogs) - Tomato leaf and earthy. d

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