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
biological source :synthetic
explosive limit :1.6-7.3%(V)
Odor Threshold :0.0015ppm
Water Solubility :210 g/L (20 ºC)
Specific Heat Capacity :Cp(liquid): 1.96 J/(g·K), at 25℃
Merck :14,5155
JECFA Number :253
BRN :635770
Henry's Law Constant :4.6×10¹ mol/(m³Pa) at 25℃, Kim and Kim (2016)
Dielectric constant :2.6（Ambient）
Major Application :flavors and fragrances
Cosmetics Ingredients Functions :BUFFERING
InChI :1S/C4H8O2/c1-3(2)4(5)6/h3H,1-2H3,(H,5,6)
InChIKey :KQNPFQTWMSNSAP-UHFFFAOYSA-N
SMILES :CC(C)C(O)=O
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)
CAS Number Unlabeled :79-31-2

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H226 Flammable liquid and vapour Flammable liquids Category 3 Warning H290 May be corrosive to metals Corrosive to Metals Category 1 Warning P234, P390, P404 H314 Causes severe skin burns and eye damage Skin corrosion/irritation Category 1A, B, C Danger P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501
Precautionary statements:	P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P233 Keep container tightly closed. P234 Keep only in original container. P240 Ground/bond container and receiving equipment. P241 Use explosion-proof electrical/ventilating/lighting/…/equipment. P242 Use only non-sparking tools. P243 Take precautionary measures against static discharge. P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. P270 Do not eat, drink or smoke when using this product. P280 Wear protective gloves/protective clothing/eye protection/face protection. P301+P330+P331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P370+P378 In case of fire: Use … for extinction. P390 Absorb spillage to prevent material damage. P403+P235 Store in a well-ventilated place. Keep cool. P405 Store locked up. P406 Store in corrosive resistant/… container with a resistant inner liner. P501 Dispose of contents/container to..…