Food safety and quality
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Flavouring |
Isobutyric acid |
Synonym(s) |
Isopropyl formic acid |
Latest JECFA evaluation |
1998 (Session 51) |
Status of specification |
Full |
Information required |
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Chemical name |
2-Methylpropionic acid |
JECFA number |
253 |
CAS number |
79-31-2 |
FEMA number |
2222 |
COE number |
6 |
FLAVIS number |
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Molecular weight |
88.11 |
Chemical formula |
C4H8O2 |
Physical form/odour |
colourless liquid with a strong penetrating odour of rancid butter |
Solubility |
miscible with alcohol, most fixed oils, glycerine and propylene glycol; insoluble in water |
Solubility in ethanol |
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Boiling point (°C) |
155° |
Assay min % |
99.0% |
Acid value max |
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Refractive index |
1.392-1.395 |
Specific gravity |
0.944-0.948 |
Other requirements |
Reducing Substances: passes test |
ID Test |
IR |
Spectrum |
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