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Mesityl oxide Structure

Mesityl oxide

Chemical Properties

Melting point −53 °C(lit.)
Boiling point 129 °C(lit.)
Density  0.858 g/mL at 25 °C(lit.)
vapor pressure  10.5 hPa (20 °C)
FEMA  3368 | 4-METHYL-3-PENTEN-2-ONE
refractive index  n20/D 1.442(lit.)
Flash point 87 °F
storage temp.  Store below +30°C.
solubility  30g/l
form  Liquid, Free Of Suspended Matter
color  Clear
Odor Strong; peppermint; honeylike.
explosive limit 1.4-10.1%(V)
Odor Type vegetable
Water Solubility  28 G/L (20 ºC)
Merck  14,5908
JECFA Number 1131
BRN  1361550
Henry's Law Constant (x 10-6 atm?m3/mol): 4.01 at 20 °C (approximate - calculated from water solubility and vapor pressure)
Exposure limits TLV-TWA 60 mg/m3 (15 ppm) (ACGIH), 10-h TWA 40 mg/m3 (10 ppm) (NIOSH); STEL 100 mg/m3 (25 ppm); IDLH 5000 ppm.
Dielectric constant 15.4(20℃)
Stability Light Sensitive
LogP 1.37 at 20℃
CAS DataBase Reference 141-79-7(CAS DataBase Reference)
NIST Chemistry Reference 3-Penten-2-one, 4-methyl-(141-79-7)
EPA Substance Registry System Mesityl oxide (141-79-7)

Safety Information

Hazard Codes  Xn
Risk Statements  10-20/21/22-36/37/38
Safety Statements  25
RIDADR  UN 1229 3/PG 3
WGK Germany  1
RTECS  SB4200000
Autoignition Temperature 344 °C
TSCA  Yes
HS Code  2914 19 90
HazardClass  3
PackingGroup  III
Hazardous Substances Data 141-79-7(Hazardous Substances Data)
Toxicity LD50 in mice (mg/kg): 710 ±85 intragastric; LC50 in mice (2 hr), rats (4 hr) (mg/m3): 10000 ±270, 9000 ±600 (Ismerov)
IDLA 1,400 ppm [10% LEL]

MSDS

Usage And Synthesis

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