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Isobutyric acid Structure

Isobutyric acid

Chemical Properties

Melting point -47 °C (lit.)
Boiling point 153-154 °C (lit.)
Density  0.95 g/mL at 25 °C (lit.)
vapor density  3.04 (vs air)
vapor pressure  1.5 mm Hg ( 20 °C)
refractive index  n20/D 1.393(lit.)
FEMA  2222 | ISOBUTYRIC ACID
Flash point 132 °F
storage temp.  Store below +30°C.
solubility  618g/l
form  Liquid
pka 4.84(at 20℃)
color  Clear colorless
PH 3.96(1 mM solution);3.44(10 mM solution);2.93(100 mM solution);
Odor at 1.00 % in propylene glycol. acidic sour cheese dairy buttery rancid
Odor Type acidic
Odor Threshold 0.0015ppm
explosive limit 1.6-7.3%(V)
Water Solubility  210 g/L (20 ºC)
Merck  14,5155
JECFA Number 253
BRN  635770
Dielectric constant 2.6(Ambient)
InChIKey KQNPFQTWMSNSAP-UHFFFAOYSA-N
LogP 1.1 at 25℃
CAS DataBase Reference 79-31-2(CAS DataBase Reference)
NIST Chemistry Reference Propanoic acid, 2-methyl-(79-31-2)
EPA Substance Registry System Isobutyric acid (79-31-2)

Safety Information

Hazard Codes  Xn
Risk Statements  21/22
Safety Statements  23-36/37/39-24/25
RIDADR  UN 2529 3/PG 3
WGK Germany  1
RTECS  NQ4375000
13
Autoignition Temperature 824 °F
TSCA  Yes
HazardClass  3
PackingGroup  III
HS Code  29156000
Hazardous Substances Data 79-31-2(Hazardous Substances Data)
Toxicity LD50 orally in Rabbit: 266 mg/kg LD50 dermal Rabbit 475 mg/kg

MSDS

Usage And Synthesis

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