Food safety and quality: details

Flavouring	Ethyl 3-(methylthio)-2-propenoate (mixture of isomers)
Synonym(s)	2-Propenoic acid, 3-(methylthio)-, ethyl ester
Latest JECFA evaluation	2010 (Session 73)
Status of specification	Full
Information required
Chemical name	Mixture of (Z)-ethyl 3-(methylthio)acrylate and (E)-ethyl 3-(methylthio)acrylate
JECFA number	1917
CAS number	77105-51-2
FEMA number	4565
COE number
FLAVIS number
Molecular weight	146.21
Chemical formula	C6H10O2S
Physical form/odour	Clear colourless liquid; Acrid sweet onion-like aroma
Solubility	Practically insoluble or insoluble in water
Solubility in ethanol	Soluble
Boiling point (°C)	200-202°
Assay min %	98%
Acid value max
Refractive index	1.510-1.541
Specific gravity	1.081-1.090 (20°)
Other requirements	Mixture of isomers: 54% (Z)-Ethyl 3-(methylthio)acrylate; 46% (E)-Ethyl 3-(methylthio)acrylate
ID Test	MS
Spectrum