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58360 Sigma-Aldrich

Isobutyric acid

puriss. p.a., ≥99.5%

Synonym: 2-Methylpropionic acid

  • CAS Number 79-31-2

  • Linear Formula (CH3)2CHCO2H

  • Molecular Weight 88.11

  •  Beilstein Registry Number 635770

  •  EC Number 201-195-7

  •  MDL number MFCD00002658

  •  PubChem Substance ID 329758414

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Properties

Related Categories Acylation Reagents, Analytical Reagents, Analytical Reagents for General Use, Analytical/Chromatography, Artemisia vulgaris,
vapor density   3.04 (vs air)
vapor pressure   1.5 mmHg ( 20 °C)
InChI Key   KQNPFQTWMSNSAP-UHFFFAOYSA-N
grade   puriss. p.a.
assay   ≥99.5% (GC)
  ≥99.5%
autoignition temp.   824 °F
expl. lim.   10 %
impurities   ≤0.2% water
refractive index   n20/D 1.393(lit.)
  n20/D 1.393
bp   153-154 °C(lit.)
mp   −47 °C(lit.)
density   0.95 g/mL at 25 °C(lit.)
cation traces   Al: ≤0.5 mg/kg
  Ba: ≤0.1 mg/kg
  Bi: ≤0.1 mg/kg
  Ca: ≤0.5 mg/kg
  Cd: ≤0.05 mg/kg
  Co: ≤0.02 mg/kg
  Cr: ≤0.02 mg/kg
  Cu: ≤0.02 mg/kg
  Fe: ≤0.1 mg/kg
  K: ≤0.5 mg/kg
  Li: ≤0.1 mg/kg
  Mg: ≤0.1 mg/kg
  Mn: ≤0.02 mg/kg
  Mo: ≤0.1 mg/kg
  Na: ≤2 mg/kg
  Ni: ≤0.02 mg/kg
  Pb: ≤0.1 mg/kg
  Sr: ≤0.1 mg/kg
  Zn: ≤0.1 mg/kg

Description

Other Notes

Same product — same quality — now Sigma-Aldrich brand

Application

Isobutyric acid may be used to synthesize methacrylic acid via oxidative dehydrogenation in the presence of a suitable heteropolyacid as catalyst.

General description

Isobutyric acid can be prepared via the carbonylation of propylene.

Price and Availability

Safety & Documentation

Safety Information

Symbol 
Signal word 
Danger
Hazard statements 
RIDADR 
UN 2529 8(3) / PGIII
WGK Germany 
1
Flash Point(F) 
131 °F
Flash Point(C) 
55 °C
Protocols & Articles
Peer-Reviewed Papers
15

References

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