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2,3-Butanedione Structure

2,3-Butanedione

Chemical Properties

Melting point -4--2 °C
Boiling point 88 °C(lit.)
Density  0.985 g/mL at 20 °C
vapor density  3 (vs air)
vapor pressure  52.2 mm Hg ( 20 °C)
refractive index  n20/D 1.394(lit.)
FEMA  2370 | DIACETYL
Flash point 45 °F
storage temp.  Store at +2°C to +8°C.
solubility  200g/l
form  Liquid
color  Clear yellow
Odor at 1.00 % in propylene glycol. strong butter sweet creamy pungent caramel
Odor Type buttery
explosive limit 2.4-13.0%(V)
Odor Threshold 0.00005ppm
Water Solubility  200 g/L (20 ºC)
Merck  14,2966
JECFA Number 408
BRN  605398
Exposure limits ACGIH: TWA 0.01 ppm; STEL 0.02 ppm
NIOSH: TWA 5 ppb; STEL 25 ppb
Stability Stable. Flammable. Incompatible with acids, strong bases, metals, reducing agents, oxidizing agents. Protect from moisture and water. Note low flashpoint.
InChIKey QSJXEFYPDANLFS-UHFFFAOYSA-N
LogP -1.340
CAS DataBase Reference 431-03-8(CAS DataBase Reference)
NIST Chemistry Reference 2,3-Butanedione(431-03-8)
EPA Substance Registry System 2,3-Butanedione (431-03-8)

Safety Information

Hazard Codes  F,Xn
Risk Statements  11-20/22-38-41-36/38-20/21/22-37/38
Safety Statements  9-16-26-37/39-36/37/39-39
RIDADR  UN 2346 3/PG 2
WGK Germany  2
RTECS  EK2625000
13
Autoignition Temperature 365 °C
TSCA  Yes
HazardClass  3
PackingGroup  II
HS Code  29141990
Hazardous Substances Data 431-03-8(Hazardous Substances Data)
Toxicity LD50 orally in rats: 1580 mg/kg (Jenner)

MSDS

Usage And Synthesis

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