|Preferred IUPAC name
3D model (JSmol)
CompTox Dashboard (EPA)
|Molar mass||88.11 g/mol|
|Density||0.9697 g/cm3 (0 °C)|
|Melting point||−47 °C (−53 °F; 226 K)|
|Boiling point||155 °C (311 °F; 428 K)|
|GHS Signal word||Danger|
|H226, H301, H311, H314, H318, H335, H402, H412|
|P210, P233, P240, P241, P242, P243, P260, P261, P264, P270, P271, P273, P280, P301+310, P301+330+331, P302+352, P303+361+353, P304+340, P305+351+338, P310, P312, P321, P322, P330, P361|
|NFPA 704 (fire diamond)|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|what is ?)(|
Isobutyric acid, also known as 2-methylpropanoic acid, is a carboxylic acid with structural formula (CH3)2CHCOOH. It is a colorless liquid with a somewhat unpleasant odor. It is soluble in water and organic solvents. Isobutyric acid is an isomer of n-butyric acid. Deprotonation or esterification of isobutyric acid gives derivatives called isobutyrates. Isobutyric acid is found in the free state in carobs (Ceratonia siliqua), in vanilla, and in the root of Arnica dulcis, and as an ethyl ester in croton oil.
Many routes are known including the hydrolysis of isobutyronitrile with alkalis and the oxidation of isobutanol with potassium dichromate in the presence of sulfuric acid, In the presence of proton donors, the action of sodium amalgam on methacrylic acid also gives isobutyric acid.
Isobutyric acid can also be manufactured commercially using engineered bacteria using a sugar feedstock.