Melting point :15 °C (monomer)
Boiling point :148 °C(lit.)
Density :1.013 g/mL at 25 °C(lit.)
vapor pressure :86hPa at 20℃
FEMA :2008 | ACETOIN
refractive index :n20/D 1.417(lit.)
Flash point :123 °F
storage temp. :2-8°C
solubility :All forms are miscible with water, alcohol, Propylene glycol, Glycerine and common flavor materials. Poorly soluble in hydrocarbons.
form :Liquid (Monomer) or Powder or Crystals (Dimer)
pka :13.21±0.20(Predicted)
color :Pale yellow to green-yellow or white to yellow
Odor :Intensely creamy-fatty-buttery, penetrating odor, yet milder and less “quinone’’-like than Diacetyl, not as sharp or volatile. Pleasant in extreme dilution.
Odor Type :buttery
Water Solubility :H2O: 0.1g/mL, clear
JECFA Number :405
Merck :14,64
BRN :385636
Stability :Hygroscopic
InChIKey :ROWKJAVDOGWPAT-UHFFFAOYSA-N
LogP :0.1 at 25℃
CAS DataBase Reference :513-86-0(CAS DataBase Reference)
NIST Chemistry Reference :2-Butanone, 3-hydroxy-(513-86-0)
EPA Substance Registry System :2-Butanone, 3-hydroxy- (513-86-0)

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 H318 Causes serious eye damage Serious eye damage/eye irritation Category 1 Danger P280, P305+P351+P338, P310
Precautionary statements:	P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P233 Keep container tightly closed. P240 Ground/bond container and receiving equipment. P241 Use explosion-proof electrical/ventilating/lighting/…/equipment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.