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Online Edition: "Specifications for Flavourings"
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| Flavouring |
Isobutyric acid |
| Synonym(s) |
Isopropyl formic acid
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| Latest JECFA evaluation |
1998 (Session 51)
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| Status of specification |
Full |
| Chemical name |
2-Methylpropionic acid
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| JECFA number |
253 |
| CAS number |
79-31-2
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| FEMA number |
2222
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| COE number |
6
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| FLAVIS number |
-
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| Molecular weight |
88.11 |
| Chemical formula |
C4H8O2
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| 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 |
- |
| Boiling point (°C) |
155 |
| Assay min % |
99.0 |
| Acid value max |
- |
| Refractive index |
1.392-1.395 |
| Specific gravity |
0.944-0.948 |
| Other requirements |
Reducing Substances: passes test |
| ID Test |
IR |
| Spectrum |
http://www.fao.org/ag/agn/jecfa-flav/img/img/253.gif
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