Flavouring Substances by Council of Europe
| Group No. | Chemical Structure |
|---|---|
| 1 | Straight-chain primary aliphatic alcohols/aldehydes/acids, acetals and esters with esters containing saturated alcohols and acetals containing saturated aldehydes. No aromatic or heteroaromatic moiety as a component of an ester or acetal. |
| 2 | Branched-chain primary aliphatic alcohols/aldehydes/acids, acetal and esters with esters containing branched-chain alcohols and acetals containing branched-chain aldehydes. No aromatic or heteroaromatic moiety as a component of an ester or acetal. |
| 3 | alpha, beta-unsaturated (alkene or alkyne) straight-chain and branched-chain aliphatic primary alcohols/aldehydes/acids, acetals and esters with esters containing alpha, beta-unsaturated alcohol and acetal containing alpha, beta-unsaturated alcohols or aldehydes. No aromatic or heteroaromatic moiety as a component of an ester or acetal. |
| 4 | Non-conjugated and accumulated unsaturated straight-chain and branched-chain aliphatic primary alcohols/aldehydes/acids, acetals and esters with esters containing unsaturated alcohols and acetals containing unsaturated alcohols or aldehydes. No aromatic or heteroaromatic moiety as a component of an ester or acetal. |
| 5 | Saturated and unsaturated aliphatic secondary alcohols/ketones/ketals/esters with esters containing secondary alcohols. No aromatic or heteroaromatic moiety as a component of an ester or ketal. |
| 6 | Aliphatic, alicyclic and aromatic saturated and unsaturated tertiary alcohols and esters with esters containing tertiary alcohols. Esters may contain any acid component. |
| 7 | Primary alicyclic saturated and unsaturated alcohols/aldehydes/acids/acetals/esters with esters containing alicyclic alcohols. Esters/acetals may contain aliphatic acyclic or alicylic acids or alcohol component. |
| 8 | Secondary alicyclic saturated and unsaturated alcohols/ketones/ketals/esters with ketals containing alicyclic alcohols or ketones and esters containing secondary alicyclic alcohols. Esters may contain aliphatic acyclic or alicyclic acid component. |
| 9 | Primary aliphatic saturated or unsaturated alcohols/aldehydes/acids/acetals/esters with a second primary, secondary or tertiary oxygenated functional group including aliphatic lactones. |
| 10 | Secondary aliphatic saturated or unsaturated alcohols/ketones/ketals/esters with a second secondary or tertiary oxygenated functional group. |
| 11 | Alicyclic and aromatic lactones. |
| 12 | Maltol derivatives and ketodioxane derivatives. |
| 13 | Furanones and tetrahydrofurfuryl derivatives. |
| 14 | Furfuryl and furan derivatives with and without additional side-chain substituents and heteroatoms. |
| 15 | Phenyl ethyl alcohols, phenylacetic acids, related esters, phenoxyacetic acids and related esters. |
| Aliphatic and alicyclic ethers. | |
| 17 | Propenylhydroxybenzenes. |
| 18 | Allylhydroxybenzenes. |
| 19 | Capsaicin related substances and related amides. |
| 20 | Aliphatic and aromatic mono- and di- thiols and mono-, di-, tri-, and polysulfides with or without additional oxygenated functional groups. |
| 21 | Aromatic ketones, secondary alcohols and related esters. |
| 22 | Aryl-substituted primary alcohol/aldehyde/acid/ester/acetal derivatives, including unsaturated ones. |
| 23 | Benzyl alcohols/aldehydes/acids/esters/acetals. Benzyl and benzoate esters included. May also contain aliphatic acyclic or alicyclic ester or acetal component. |
| 24 | Pyrazine derivatives. |
| 25 | Phenol derivatives containing ring-alkyl, ring-alkoxy, and side-chains with an oxygenated functional group. |
| 26 | Aromatic ethers including anisole derivatives. |
| 27 | Anthranilate derivatives. |
| 28 | Pyridine, pyrrole, and quinoline derivatives. |
| 29 | Thiazoles, thiophene, thiazoline and thienyl derivatives. |
| 30 | Miscellaneous substances. |
| 31 | Aliphatic and aromatic hydrocarbons. |
| 32 | Epoxides. |
| 33 | Aliphatic and aromatic amines. |
| 34 | Amino acids. |
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