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Cumene Structure


  • Product NameCumene
  • CAS98-82-8
  • CBNumberCB2191522
  • MFC9H12
  • MW120.19
  • EINECS202-704-5
  • MDL NumberMFCD00008881
  • MOL File98-82-8.mol
  • MSDS FileSDS

Chemical Properties

Melting point −96 °C(lit.)
Boiling point 152-154 °C(lit.)
Density  0.864 g/mL at 25 °C(lit.)
vapor density  4.1 (vs air)
vapor pressure  8 mm Hg ( 20 °C)
refractive index  n20/D 1.491(lit.)
Flash point 115 °F
storage temp.  2-8°C
solubility  0.05g/l
form  Liquid
pka >14 (Schwarzenbach et al., 1993)
color  Clear colorless
Odor Strong, slightly irritant; fragrant; aromatic.
explosive limit 0.8-6.0%(V)
Odor Threshold 0.0084ppm
Water Solubility  Soluble in alcohol, ether, acetone, benzene, carbon tetrachloride. Insoluble in water.
Merck  14,2617
BRN  1236613
Henry's Law Constant 13.0, 15.3, and 23.9 at 28.0, 35.0, and 46.1 °C, respectively (headspace method, Hansen et al., 1993)
Exposure limits Flammable liquid; flash point (closed cup) 36°C (97°F) (NFPA 1986), 39°C (102°F) (Merck 1996), 35.5°C (96°F) (Meyer 1989); vapor pressure 8 torr at 20°C (68°F); vapor density 4.1 (air=1); the vapor is heavier than air and may travel a considerable distance to a nearby ignition source and flash back; autoignition temperature 425°C (797°F); fire- extinguishing agent: dry chemical, foam, or CO2; use a water spray to keep fire- exposed containers cool and to disperse the vapors。
Cumene forms explosive mixtures in the air within the range 0.9–6.5% by volume in air. Cumene may form peroxide on prolonged exposure to air. It should be tested for peroxides before it is subjected to distillation or evaporation。.
Dielectric constant 2.4(20℃)
Stability Stable, but may form peroxides in storage if in contact with the air. Test for the presence of peroxides before heating or distilling. Combustible. Incompatible with strong oxidizing agents.
LogP 3.55 at 20℃
CAS DataBase Reference 98-82-8(CAS DataBase Reference)
Proposition 65 List Cumene
IARC 2B (Vol. 101) 2013
NIST Chemistry Reference Benzene, (1-methylethyl)-(98-82-8)
EPA Substance Registry System Cumene (98-82-8)


Signal wordDanger
Hazard statements H226-H304-H335-H411
Precautionary statements P210-P233-P240-P273-P301+P310-P331
Hazard Codes  Xn,N,T,F
Risk Statements  10-37-51/53-65-39/23/24/25-23/24/25-11
Safety Statements  24-37-61-62-45-36/37-16
RIDADR  UN 1918 3/PG 3
WGK Germany  1
RTECS  GR8575000
Autoignition Temperature 797 °F
HazardClass  3
PackingGroup  III
HS Code  29027000
Hazardous Substances Data 98-82-8(Hazardous Substances Data)
Toxicity LD50 orally in rats: 2.91 g/kg (Smyth)
IDLA 900 ppm [10% LEL]
NFPA 704:
2 1

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