| Primary (First) - onion |
| FL/FR | 2- | acetyl thiophene |
| | odor: sulfurous nutty hazelnut walnut |
| | flavor: onion, malty, roasted |
| FL | | allium porrum extract |
| | odor: alliaceous onion |
| | flavor: alliaceous onion |
| FL | | allyl disulfide |
| | odor: Alliceous, onion and garlic-like with metallic nuances |
| | flavor: Green onion and garlic-Iike with meaty nuances |
| FL | | allyl mercaptan |
| | odor: Sulfurous and alliaceous, sauteed onion and garlic, roasted, grilled and charred meaty nuances |
| | flavor: Alliaceous onion, garlic and leek. It has meaty bouillon savory nuances |
| FL | | allyl thiopropionate |
| | odor: Fresh onion garlic-like with green gassy nuances |
| | flavor: Fresh onion with a green sweet vegetable nuance |
| | | benzyl propanesulfinate |
| | odor: cooked cabbage sauerkraut |
| | flavor: onion-beef broth |
| | | cyclopentyl propanesulfinate |
| | odor: sweet onion |
| | flavor: sweet taste of steamed onions |
| FL | | diallyl polysulfides |
| | odor: garlic onion |
| | flavor: sulfurous |
| FL | | diallyl tetrasulfide |
| | odor: strong garlic onion |
| | flavor: sulfurous |
| FL | | diallyl trisulfide |
| | odor: garlic green onion metallic |
| | flavor: sulfurous green onion garlic metallic |
| FL | | diallyl trisulfide |
| | odor: garlic green onion metallic |
| | flavor: sulfurous green onion garlic metallic |
| FL | | dicyclohexyl disulfide |
| | odor: Alliaceous, onion, egg, nut skin, coffee, clam, crab and coffee |
| | flavor: Onion, meaty, clam, crab, coffee and cocoa |
| FL | (±)-3,5- | diethyl-1,2,4-trithiolane |
| | 2,4- | dimethyl-1,3-dithiolane |
| | flavor: onion metallic sulfurous |
| | 3,5- | dimethyl-1,2-dithiolane |
| | odor: sulfurous onion cooked onion |
| | flavor: cooked onion cooked vegetable nutty |
| | 1,3- | dithiane |
| | odor: alliaceous roasted |
| | flavor: onion garlic metallic |
| FL/FR | | ethyl 2-mercaptopropionate |
| | odor: sulfury meaty green onion |
| | flavor: onion cooked garlic |
| | | furfuryl propyl sulfide |
| | flavor: onion |
| FL | | furfuryl isopropyl sulfide |
| | odor: coffee savory meaty floral |
| | flavor: onion |
| | 2- | mercaptopyrimidine |
| | odor: penetrating sharp green onions |
| | flavor: burning onions |
| FL | | methionol |
| | odor: SuIfureous and onion-like with a sweet, savory, soupy-cooked vegetable nuance |
| | flavor: Onion- and garlic-like, with a savory bouillion-like note |
| | 2- | methyl-1,3-dithiane |
| | flavor: onion metallic |
| | 4- | methyl-1,3-dithiane |
| | flavor: onion garlic tomato sulfurous |
| | 3- | methyl-1,2-dithiolane |
| | flavor: onion metallic cooked beef braised vegetable |
| | 4- | methyl-1,2-dithiolane |
| | flavor: onion rooty vegetable |
| | 4- | methyl-1,3-dithiolane |
| | odor: sulfurous alliaceous tomato |
| | flavor: onion rooty vegetable |
| | | methyl propanesulfinate |
| | odor: cooked onion with fruity and light sweet aroma backnotes |
| | flavor: sweet onion juice character with a burning sensation |
| FL | | methyl propyl disulfide |
| | odor: Sulfureous, alliaceous, radish, mustard, tomato, potato and garlic |
| | flavor: Onion, garlic, tomato, potato, alliaceous and vegetative |
| | 2- | methyl-5-propyl thiophene |
| | flavor: onion |
| FL | | methyl propyl trisulfide |
| | odor: Sulfureous, onion, garlic, green, metallic and clean with a cooked scallion nuance |
| | flavor: Onion, garlic, fresh and metallic with a cheese nuance |
| FD | | onion |
| | flavor: onion |
| FD | green | onion |
| FD | green | onion |
| FL | | onion flavor |
| FL | caramelized | onion flavor |
| FL | fried | onion flavor |
| FL | green | onion flavor |
| FL | green | onion flavor |
| FL | grilled | onion flavor |
| FL | maui | onion flavor |
| FL | red | onion flavor |
| FL | roasted | onion flavor |
| FL | sauteed | onion flavor |
| FL | toasted | onion flavor |
| FL | vidalia | onion flavor |
| FL | white | onion flavor |
| FL | yellow | onion flavor |
| FL | | onion juice concentrate |
| | flavor: onion |
| FL/FR | | onion oil |
| | odor: obnoxious sulfide onion |
| | flavor: alliaceous onion |
| FL/FR | | onion oil CO2 extract |
| | odor: obnoxious sulfide onion |
| | flavor: onion |
| FL/FR | | onion oil dutch |
| | odor: obnoxious sulfide onion |
| | flavor: onion |
| FL/FR | | onion oil egypt |
| | odor: obnoxious sulfide onion |
| | flavor: onion |
| FL | | onion oil extenders |
| | flavor: onion |
| FL/FR | | onion oil mexico |
| | flavor: onion |
| FL | | onion oleoresin |
| | flavor: onion |
| FL | fried | onion oleoresin |
| | flavor: onion fried |
| FL/FR | green | onion oleoresin |
| | flavor: green onion |
| FL/FR | green | onion oleoresin |
| | flavor: green onion |
| FL | sauteed sweet | onion oleoresin |
| | flavor: onion |
| | | propyl propanesulfinate |
| | odor: sweet fresh onion juice |
| | flavor: strong onion |
| FL | | propyl thioacetate |
| | odor: Sulfureous green onion, garlic, scallion, green fresh, vegetative |
| | flavor: Onion, garlic sulfureous, alliaceous with a fresh green nuance |
| FL | | scallion flavor |
| FL | | shallot flavor |
| FL | fried | shallot flavor |
| FL | roasted | shallot flavor |
| FL | toasted | shallot flavor |
| FL | | shallot oil |
| | odor: alliaceous sulfurous onion |
| | flavor: Sweet, sulfureous, alliaceous, pungent with a toasted-onion nuance |
| FL | | shallot oleoresin |
| | flavor: onion |
| FL | fried | shallot oleoresin |
| | flavor: fried onion |
| FL | 3- | tetrahydrothiophenone |
| | odor: Alliaceous, cooked meaty with green vegetable nuances |
| | flavor: alliaceous onion garlic coffee chive |
| FL | | truffle sulfide |
| | odor: Pungent, metallic, alliaceous, garlic and mustard like with mushroom and horseradish nuances |
| | flavor: Alliaceous, sulfurous fresh onion and garlic-like with cruciferous vegetable nuances of cabbage, spicy nuances of mustard and horseradish |
| Secondary (Second) - onion |
| FL | | allyl disulfide |
| | odor: Alliceous, onion and garlic-like with metallic nuances |
| | flavor: Green onion and garlic-Iike with meaty nuances |
| FL | | allyl sulfide |
| | odor: Pungent, sulfurous, onion-garlic and horseradish-like with a metallic nuance |
| | flavor: Sulfurous, onion-garlic and vegetative radish-like with a slightly hot nuance |
| FL | | butter onion garlic flavor |
| FL | | chive extract |
| | flavor: chive |
| FL | | chive flavor |
| FL | | cyclopentyl mercaptan |
| | odor: Alliaceous, onion, garlic, horseradish, vegetable-celery, egg, sauteed meat |
| | flavor: Alliaceous, onion, garlic, horseradish, meat, egg, burned, vegetable, celery |
| FL | | diethyl disulfide |
| | odor: gassy ripe onion greasy garlic |
| | flavor: gassy onion |
| | 2,4- | dimethyl-1,3-dithiane |
| | flavor: alliaceous onion metallic |
| | 1,3- | dithiolane |
| | odor: sweet sulfurous onion |
| | flavor: sweet sulfurous ripe onion |
| FL/FR | | ethyl (E)-2-crotonate |
| | odor: Pungent, chemical and diffusive, with sweet alliaceous and caramellic rum-like nuances |
| | flavor: Musty, onion and garlic, caramellic and brown notes |
| FL/FR | | ethyl methyl mercaptopropionate |
| | odor: Sulfureous, metallic, pineapple, fruity ripe, pulpy and tomato |
| | flavor: Sulfureous, onion garlic, pineapple, rumy, vegetative |
| FL | S- | ethyl thioacetate |
| | odor: Sulfuraceous, fruity, onion / garlic with meaty nuances |
| | flavor: Sulfuraceous, onion / garlic with a sweet fruity aftertaste |
| FL/FR | 1- | furfuryl pyrrole |
| | odor: plastic green waxy fruity coffee vegetable |
| | flavor: Vegetative, onion, sharp and metallic |
| | 2-( | furyl-2)-ethanthiol acetate |
| | flavor: burnt, onion, mushroom |
| | 2-(2- | furyl)ethanethiol |
| | flavor: burnt, onion, caramel |
| | 2-(1- | mercaptoethyl) furan |
| | flavor: burnt onion caramellic |
| FL | 3- | mercapto-2-methyl-1-butanol |
| | odor: sulfurous |
| | flavor: strong onion-like, brothy |
| | 2- | mercaptopyrimidine |
| | odor: penetrating sharp green onions |
| | flavor: burning onions |
| FL | | methional diethyl acetal |
| | odor: pungent cabbage |
| | flavor: mushroom onion green sweet tomato garlic |
| FL | | methyl ethyl disulfide |
| | odor: sulfurous truffle |
| | flavor: sulfurous onion |
| FL/FR | | methyl furfuryl disulfide |
| | odor: Roasted coffee, sulfurous cooked meat and liver, onion and garlic nuances. Slight eggy undertones |
| | flavor: Roasted coffee, toasted onion and garlic, with roasted beef and fried pork nuances |
| FL | | methyl 3-mercaptobutanoate |
| | flavor: pungent alliaceous onion |
| FL | | methyl 5-methyl furfuryl sulfide |
| | flavor: mustard, onion-like |
| FL | caramelized | onion oleoresin |
| | flavor: sulfurous onion caramellic |
| | | pyrazinemethyl ethyl sulfide |
| | flavor: cabbage, onion |
| FL | | thialdine |
| | odor: sulfurous nutty hazelnut corn meaty earthy clam |
| | flavor: sulfurous green onion radish garlic cooked onion earthy brothy |
| | 2-( | thienyl-2)-ethanethiol acetate |
| | flavor: burnt, onion |
| FL | ortho- | thiocresol |
| | odor: Meaty,sulfuraceous, onion, garlic, egg, chemical, rubber, naphthyl and musty |
| | flavor: Meaty, onion, garlic, chemical and metallic |
| FL | 2,4,6- | trithiaheptane 10% in triacetin |
| | odor: sulfurous cooked roasted |
| | flavor: sulfurous onion |
| Tertiary (Third) - onion |
| FL | | allyl methyl sulfide |
| | odor: alliaceous garlic onion |
| | flavor: sulfurous alliaceous onion savory |
| FL/FR | | dibutyl sulfide |
| | odor: green grassy violet-leaf herbal rose geranium |
| | flavor: Green, vegetative, onion garlic, horseradish, savory |
| FL | | furfuryl thiopropionate |
| | odor: Sulfureous, coffee-like, onion and garlic, with a sauteed savory nuance |
| | flavor: Sulfureous, coffee, onion and garlic-like with meaty savory roast nuances |
| FL | | garlic oleoresin |
| | odor: Roasted, onion, garlic, with sulfury savory HVP-like nuances |
| | flavor: Burnt, roasted, sauteed, onion and garlic |
| FL | | leek flavor |
| FL | (R,S)-2- | mercapto-3-butanol |
| | odor: SuIfureous, roasted meat, alliaceous, sauteed onion and garlic |
| | flavor: Meaty, savory, sauteed onion and garlic |
| FL | 3- | mercapto-2-pentanone |
| | odor: Intense sulfurous, alliaceous and catty. It has nutty hazelnut note with savory roasted meaty nuances. It has faint nuances of tropical fruits and grapefruit |
| | flavor: Intense alliaceous, sulfurous, onion with full bodied savory notes of roasted meat |
| FL | 2- | methyl-1,3-dithiolane |
| | odor: sulfurous alliaceous smoky savory vegetable |
| | flavor: cooked roasted onion |
| FL | | methyl 4-(methyl thio) butyrate |
| | odor: sulfury cabbage fruity pineapple cheese |
| | flavor: sulfurous garlic green onion chive green cheesy |
| FL/FR | 2- | methyl 5-(methyl thio) furan |
| | odor: Sulfureous, onion, garlic, coffee and mustard-like with pungent horseradish and peppery nuances |
| | flavor: Musty, mustard, onion, garlic, mushroom, coffee and savory nuances |
| FL | 2- | methyl thioacetaldehyde |
| | odor: Sulfureous, vegatative, onion, garlic, mustard and nutty with a potato nuance |
| | flavor: Alliaceous and vegetative with a good mouthfeel and onion and garlic-like with a potato and bready nuance |
| | 2-( | thienyl-2)-ethanethiol |
| | flavor: burnt, coffee grounds, onion |
| Quaternary (Fourth) - onion |
| FL | 2- | methyl-1,3-dithiolane |
| | odor: sulfurous alliaceous smoky savory vegetable |
| | flavor: cooked roasted onion |
| FL | 2- | methyl thiophene |
| | odor: sulfurous alliaceous onion roasted green |
| | flavor: sulfurous roasted green cabbage onion bitter |
| FL/FR | | propyl mercaptan |
| | odor: cabbage natural gas sweet onion |
| | flavor: alliaceous fresh meaty onion sulfurous |
| Quinary (Fifth) - onion |
| FL | alpha- | benzylidene methional |
| | odor: vegetative sauerkraut, kimchi, cabbage, soy beans, green onion nuances |
| | flavor: Vegetative sauerkraut, kimchi, cabbage, soy beans, green onion nuances |
| FL/FR | | coffee difuran |
| | odor: Sulfurous, coffee, furfuryl mercaptan, roasted, meaty, onion and cabbage, potato |
| | flavor: Sulfurous, coffee, roasted meaty, onion |
| FL/FR | | ethyl vinyl ketone |
| | odor: Pungent, etherial, lifting, peppery, garlic, mustard and onion |
| | flavor: Pungent, etherial, peppery, garlic, onion, fishy and mustard with a hot nuance |
| FL | | garlic distillates |
| | flavor: garlic |
| FL | | garlic flavor |
| FL | 3- | mercapto-2-methyl pentanal |
| | odor: sulfurous, , savory grilled or roasted beef and cooked chicken like, alliaceous, garlic with tropical fruit and cultured dairy nuances |
| | flavor: Sulfureous, alliaceous, roasted savory with cooked onion and sauteed garlic notes and tropical fruit nuances of mango and passionfruit |
| FL | | methyl benzyl disulfide |
| | odor: Sulfureous cabbage-like, vegetative with a green metallic nuance |
| | flavor: Sulfureous, vegetative, metallic, green, with an onion nuance |
| FL | bis(2- | methyl-3-furyl) disulfide |
| | odor: Sulfurous, strong roasted meaty with a note reminiscent of sulfurol, savory, au jus and chicken nuances |
| | flavor: Strong meaty, sulfurous, brothy with a hint of thiamin, roasted savory, with nuances of cooked onion, sauteed garlic and black pepper |
| FL | | methyl 2-(methyl thio) butyrate |
| | odor: sulfurous musty onion fruity tropical green |
| | flavor: sulfury savory eggy vegetable onion fruity tropical |
| FL | | methyl thiomethyl butyrate |
| | odor: Sulfureous, musty, onion, savory, fruity and tropical with vegetative nuances |
| | flavor: Sulfureous, savory, eggy, vegetative and onion with fruity, tropical nuances |
| FL | iso | propyl mercaptan |
| | odor: strong ripe onion gassy meaty sulfurous |
| | flavor: Soft-boiled egg yolk, hydrogen sulfide, rich mouth feel, strong poultry, leek and onion-like |
| FL | | thialdine |
| | odor: sulfurous nutty hazelnut corn meaty earthy clam |
| | flavor: sulfurous green onion radish garlic cooked onion earthy brothy |
| Senary (Sixth) - onion |
| FL | | butyl mercaptan |
| | odor: Sulfureous, fatty, stewed beef, sauteed onion, egg, coffee and garlic |
| | flavor: Sulfureous, vegetative, savory meaty, garlic and onion |
| FL | 1,4- | dithiane |
| | odor: Seafood-like, solvent, garlic and onion, pyridine like |
| | flavor: Seafood-like, clam and oyster fermented garlic and onion, mushroom and turkey |
| FL/FR | | methional |
| | odor: Vegetable oil. Creamy tomato, potato skin and French fry, yeasty, bready, limburger cheese with a savory meaty brothy nuance |
| | flavor: Musty tomato, potato, vegetative, mold ripened cheeses, onion, beefy brothy and egg and seafood nuances |
| FL | 3- | methyl-2-butane thiol |
| | odor: sulfurous, savory burnt rubber, roasted chicken and pork meaty with nuances of roasted coffee, cultured cheeses and roasted cashew nuts. |
| | flavor: sulfurous, savory fried meaty, fried fatty with coffee and cooked onion nuances with a slight tongue bite |
| FL | 1-( | methyl thio)-2-butanone |
| | odor: fresh radish, mustard, horseradish and wasabi like with alliaceous onion and savory metallic and vegetative nuances. |
| | flavor: sulfurous, cabbage and radish, horseradish, toasted onion and dairy like nuances |
| Septenary (Seventh) - onion |
| FL/FR | 3- | mercaptohexyl acetate |
| | odor: floral fruity pear tropical passion fruit blackberry raspberry black currant bud |
| | flavor: sulfurous tropical fruit passion fruit black currant bud roasted meaty onion durian |
| FL/FR | 2- | octen-4-one |
| | odor: Yeasty, fruity, mushroom, metallic, bready, pineapple, horseradish, earthy |
| | flavor: Vegetable green earthy, horseradish, anchovy, earthy, ketonic, onion, musty, tropical lift, yeasty, bready, mushroom, fermented |
| FL/FR | | passiflora acetate |
| | odor: Sulfurous, metallic, buchu-like cattiness, sweet fruity tropical with lingering apricot and peach notes. Green vegetative with onion and garlic notes. Slight burnt rubber nuances |
| | flavor: Sulfurous, juicy, tropical fruit with fuzzy guava and passion fruit notes. Savory boiled egg and cooked onion |
| Octonary (Eighth) - onion |