Isobutyric acid
SIAL/58360 - puriss. p.a., ≥99.5%
Synonym: 2-Methylpropionic acid
CAS Number: 79-31-2
Empirical Formula (Hill Notation): C4H8O2
Molecular Weight: 88.11
EC Number: 201-195-7
MDL Number: MFCD00002658
Linear Formula: (CH3)2CHCO2H
Product Type: Chemical
assay | ≥99.5% |
≥99.5% (GC) | |
autoignition temp. | 824 °F |
bp | 153-154 °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 | |
density | 0.95 g/mL at 25 °C (lit.) |
expl. lim. | 10 % |
grade | puriss. p.a. |
impurities | ≤0.2% water |
InChI | 1S/C4H8O2/c1-3(2)4(5)6/h3 |
InChI key | KQNPFQTWMSNSAP-UHFFFAOYSA |
mp | −47 °C (lit.) |
Quality Level | 200 ![]() |
refractive index | n |
n |
|
SMILES string | CC(C)C(O)=O |
vapor density | 3.04 (vs air) |
vapor pressure | 1.5 mmHg ( 20 °C) |
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. |
Symbol | ![]() ![]() ![]() |
Signal word | Danger |
Hazard statements | H226 - H302 - H311 - H314 |
Precautionary statements | P210 - P233 - P280 - P301 + P312 - P303 + P361 + P353 - P305 + P351 + P338 |
Hazard Codes | C |
Risk Statements | 10-21/22-34 |
Safety Statements | 26-36/37/39-45 |
RIDADR | UN 2529 8(3) / PGIII |
WGK Germany | WGK 1 |
Flash Point(F) | 131.0 °F - closed cup |
Flash Point(C) | 55 °C - closed cup |
Purity | ≥99.5% (GC); ≥99.5% |
bp | 153-154 °C (lit.) |
mp | −47 °C (lit.) |
Density | 0.95 g/mL at 25 °C (lit.) |
Refractive Index | n |
UNSPSC | 12352100 |