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Online Edition: "Specifications for Flavourings"

Flavouring trans-2-Methyl-2-butenoic acid
Synonym(s) Tiglic acid;trans-2-Methylcrotonic acid;Tiglinic acid;(E)-2,3-Dimethylacrylic acid;Cevadic acid
Latest JECFA evaluation 2003 (Session 61)
Status of specification Full
Chemical name 2-Methyl-2-(E)-butenoic acid
JECFA number 1205
CAS number 80-59-1
FEMA number 3599
COE number
FLAVIS number 08.064
Molecular weight 100.1
Chemical formula C5H8O2
Physical form/odour White crystalline solid; sweet, warm, spicy aroma
Solubility Slightly soluble in water; insoluble in oils
Solubility in ethanol soluble
Boiling point (°C) NA
Assay min % 99%
Acid value max
Refractive index NA
Specific gravity NA
Other requirements mp: 61-67°
ID Test MS