Table 3.
Assignment of rum ether components to congeneric groups
| Congeneric group | Congeneric group no | Compounds in rum ether distributed into congeneric groups | Supporting substances in FGEs |
|---|---|---|---|
| Saturated linear primary aliphatic alcohols/aldehydes/acids/esters and acetals, including a cyclic acetal | 1 | Ethanol, Ethyl acetate, Ethyl propionate, Ethyl butyrate, Ethyl formate, Acetic acid, Acetaldehyde, Propyl acetate, Methyl formate, Ethyl valerate, Methyl propionate, Propanoic acid, Methyl acetate, Formic acid, Methanol, 1‐Butanol, Butyl acetate, Ethyl nonanoate, Ethyl hexanoate, Butanoic acid, Acetic anhydride, Diethyl succinate, Butanal diethyl acetal, Acetaldehyde diethyl acetal, Formaldehyde diethylacetal, Propanal diethyl acetal, Acetaldehyde ethyl methyl acetal, Acetaldehyde dimethyl acetal, Hexanal diethyl acetal, 2‐Ethoxytetrahydrofuran | FGE.02Rev1 (EFSA, 2008a), FGE.03Rev2 (EFSA CEF Panel, 2011a) |
| Saturated aliphatic, acyclic, branched‐chain primary alcohols, aldehydes, carboxylic acids and related esters and acetals | 2 | Ethyl isobutyrate, Ethyl isovalerate, Ethyl 2‐methylbutanoate, Isobutanal diethyl acetal, 2‐Methylbutanal diethyl acetal, 3‐Methylbutanal diethyl acetal, Isobutyl acetate, Ethyl 3‐methylpentanoate, Ethyl 4‐methylpentanoate | FGE.01Rev2 (EFSA CEF Panel, 2010c), FGE.03Rev2 |
| α,β‐Unsaturated linear and branched aliphatic primary alcohols/ketones/esters (excluding esters of α,β‐unsaturated carboxylic acids) | 3 | 2‐Propenyl acetate, Allyl alcohol, 3‐Penten‐2‐one, 2‐Methyl‐2‐cyclopentenone, 2‐Cyclopenten‐1‐one | FGE.05Rev2 (EFSA CEF Panel, 2010b), FGE.07Rev5 (EFSA CEF Panel, 2017), FGE.212Rev3 (EFSA CEF Panel, 2015c), FGE.09Rev6 (EFSA CEF Panel, 2015c), FGE.51Rev2 (EFSA CEF Panel, 2016) |
| Ester of an alicyclic carboxylic acid | 4 | Ethyl cyclopropanecarboxylate | FGE.44 (EFSA, 2008b) |
| Esters of unsaturated linear and branched aliphatic carboxylic acids | 5 | Ethyl 4‐pentenoate, Ethyl but‐3‐enoate, Ethyl methacrylate, Ethyl crotonate, Ethyl acrylate, Ethyl 2‐pentenoate, Ethyl 2‐methyl‐2‐butenoate, Ethyl pent‐3‐enoate, Ethyl 3‐methyl‐but‐3‐enoate | FGE.05Rev2 |
| Aliphatic primary alcohols, aldehydes, carboxylic acids, acetals and esters containing additional oxygenated functional groups | 6 | 1,1‐Diethoxyacetone, 1,1‐Diethoxyhexan‐2‐one, Acetol, Ethyl glycolate, Ethyl lactate, Ethyl levulinate, Ethyl pyruvate, Glyceraldehyde diethyl acetal, Hydroxyacetaldehyde diethyl acetal | FGE.10Rev3 (EFSA CEF Panel, 2016) |
| Saturated aliphatic acyclic ketones | 7 | Acetone, 2‐Pentanone, 2‐Butanone | FGE.07Rev5 |
| Aliphatic α‐diketones and related α‐hydroxyketones | 8 | Diacetyl, 1‐Hydroxybutanone, 2,3‐Pentanedione | FGE.11Rev3 (EFSA CEF Panel, 2014) |
| Alicyclic ketones and secondary alcohols | 9 | Cyclopentanone, 2‐Methylcyclopentanone | FGE.09Rev6, FGE.51Rev2 |
| Aliphatic and alicyclic ethers | 10 | Diethylether, 1,1,3‐Triethoxybutane, Diethoxytetrahydrofuran (3 isomers), 2,5‐Diethoxytetrahydropyran | FGE.23Rev4 (EFSA CEF Panel, 2013) |
| Furfural and related substances | 11 | Furfural, 3‐Furaldehyde, 2‐Furfural diethyl acetal, 5‐Methyl‐2‐furfural, Ethyl‐2‐furoate, Ethyl 5‐methyl furoate | FGE.13Rev2 (EFSA CEF Panel, 2011b), FGE.67Rev2 (EFSA CEF Panel, 2015a) |
| Furan derivatives | 12 | Furan, 2‐Methylfuran, 2‐Acetylfuran | FGE.13Rev2, FGE.67Rev2 |
FGE: Flavouring Group Evaluation.