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I1754

Isobutyric acid

99%

Synonym(s):

2-Methylpropionic acid

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About This Item

Linear Formula:
(CH3)2CHCO2H
CAS Number:
79-31-2
Molecular Weight:
88.11
UNSPSC Code:
12352100
NACRES:
NA.22
PubChem Substance ID:
24895944
EC Number:
201-195-7
Beilstein/REAXYS Number:
635770
MDL number:
MFCD00002658
Assay:
99%
Form:
liquid
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vapor density

3.04 (vs air)

Quality Level

100

vapor pressure

1.5 mmHg ( 20 °C)

assay

99%

form

liquid

autoignition temp.

824 °F

expl. lim.

10 %

refractive index

n20/D 1.393 (lit.)

bp

153-154 °C (lit.)

mp

−47 °C (lit.)

density

0.95 g/mL at 25 °C (lit.)

SMILES string

CC(C)C(O)=O

InChI

1S/C4H8O2/c1-3(2)4(5)6/h3H,1-2H3,(H,5,6)

InChI key

KQNPFQTWMSNSAP-UHFFFAOYSA-N

General description

Isobutyric acid is a carboxylic acid used as a building block in the production of active pharmaceutical ingredients (APIs).

Application

Isobutyric acid can be used:
  • to synthesize butyl isobutyrate via esterification with n-butanol using lipases
  • as a precursor for Methacrylic acid (MAA) through catalytic oxidative dehydrogenation. It can be produced through fermentative pathways

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Danger

Hazard Classifications

Acute Tox. 3 Dermal - Acute Tox. 4 Oral - Eye Dam. 1 - Flam. Liq. 3 - Skin Corr. 1B

Storage Class

3 - Flammable liquids

flash_point_f

131.0 °F - closed cup

flash_point_c

55 °C - closed cup

ppe

Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter

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