propanoic acid, 2-methyl-

propanoic acid, 2-methyl-,

IUPAC name for isobutyric acid (see butyric acidbutyric acid
or butanoic acid
, CH3CH2CH2CO2H, viscous, foul-smelling, liquid carboxylic acid; m.p. about −5°C;; b.p. 163.5°C;. It is miscible with water, ethanol, and ether.
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).