Isobutyric acid is a branched fatty acid comprising propanoic acid carrying a methyl branch at C-2. It has a role as a volatile oil component, a plant metabolite and a Daphnia magna metabolite. It is a branched-chain saturated fatty acid, a methyl-branched fatty acid and a fatty acid 4:0. It is a conjugate acid of an isobutyrate.
CAS No.
79-31-2
Formula
C4H8O2
Molecular Mass
88.10510
Exact Mass
88.05240
PSA
37.30000
Logp
0.72700
IUPAC
2-methylpropanoic acid
Attribute classification
Matter Classification
organic
Category
Chemical and Physical Properties
Melting Point
-47 °C
Density
0.95 g/mL at 25 °C(lit.)
Boiling Point
153-154 °C(lit.)
Flash Point
132 °F
Appearance
Isobutyric acid appears as a colorless liquid with a light odor of rancid butter.
Manufacturing
