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A4979312

Isobutyric acid , Analysis of standard products,> 99.5%(GC) , 79-31-2

Synonym(s):
2-Methylpropionic acid;Isobutanoic acid;Isobutyric acid

CAS NO.:79-31-2

Empirical Formula: C4H8O2

Molecular Weight: 88.11

MDL number: MFCD00002658

EINECS: 201-195-7

Update time: 2022-07-08

PRODUCT 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
explosive limit 1.6-7.3%(V)
Odor Threshold 0.0015ppm
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℃

Description and Uses

Isobutyric acid is used to prepare esters for flavors and perfumes. It is also used as a disinfecting agent, preservative and tanning agent. It finds applications in textile, varnish and the leather industry. Further, it is used as a lactation stimulant in dairy cattle. In addition to this, it is used in the preparation of tetramethylsuccinic acid and diisopropyl ketone.

Safety

Symbol(GHS) 
GHS02,GHS05,GHS06
Signal word  Danger
Hazard statements  H226-H302-H311-H314
Precautionary statements  P210-P233-P280-P301+P312-P303+P361+P353-P305+P351+P338
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
Toxicity LD50 orally in Rabbit: 266 mg/kg LD50 dermal Rabbit 475 mg/kg

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