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8.00472

Sigma-Aldrich

Isobutyric acid

for synthesis

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Synonym(s):
Isobutyric acid, 2-Methylpropionic acid
Linear Formula:
(CH3)2CHCOOH
CAS Number:
79-31-2
Molecular Weight:
88.11
MDL number:
MFCD00002658
UNSPSC Code:
12352106
EC Index Number:
201-195-7
NACRES:
NA.22

vapor pressure

2 hPa ( 20 °C)

Quality Level

200

Assay

≥99.0% (GC)

form

liquid

autoignition temp.

455 °C

potency

266 mg/kg LD50, oral (Rat)
475 mg/kg LD50, skin (Rabbit)

expl. lim.

1.6-7.3 % (v/v)

pH

2.3 (25 °C, 500 g/L in H2O)

mp

-46 °C

transition temp

flash point 62 °C

solubility

618 g/L

density

0.95 g/cm3 at 20 °C

storage temp.

2-30°C

InChI

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

InChI key

KQNPFQTWMSNSAP-UHFFFAOYSA-N

Related Categories

Analysis Note

Assay (GC, area%): ≥ 99.0 % (a/a)
Density (d 20 °C/ 4 °C): 0.947 - 0.949
Water (K. F.): ≤ 0.20 %
Identity (IR): passes test

Signal Word

Danger

Hazard Statements

H226 - H302 - H311 - H314

Hazard Classifications

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

Storage Class Code

3 - Flammable liquids

WGK

WGK 1

Flash Point(F)

131.0 °F - closed cup

Flash Point(C)

55 °C - closed cup

Regulatory Information

危险化学品

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