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98-82-8

Name CUMENE
CAS 98-82-8
EINECS(EC#) 202-704-5
Molecular Formula C9H12
MDL Number MFCD00008881
Molecular Weight 120.19
MOL File 98-82-8.mol

Chemical Properties

Appearance Cumene is a colorless liquid. Sharp, penetrating, aromatic odor, like gasoline.
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.)
Fp  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.
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.
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)
Dielectric constant 2.4(20℃)
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。.
InChIKey RWGFKTVRMDUZSP-UHFFFAOYSA-N
LogP 3.55 at 20℃
Uses
Production of phenol, acetone, and α- methylstyrene; solvent.
CAS DataBase Reference 98-82-8(CAS DataBase Reference)
IARC 2B (Vol. 101) 2013
NIST Chemistry Reference Benzene, (1-methylethyl)-(98-82-8)
EPA Substance Registry System 98-82-8(EPA Substance)

Safety Data

Hazard Codes  Xn,N
Risk Statements 
R10:Flammable.
R37:Irritating to the respiratory system.
R51/53:Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment .
R65:Harmful: May cause lung damage if swallowed.
Safety Statements 
S24:Avoid contact with skin .
S37:Wear suitable gloves .
S61:Avoid release to the environment. Refer to special instructions safety data sheet .
S62:If swallowed, do not induce vomiting: seek medical advice immediately and show this container or label .
RIDADR  UN 1918 3/PG 3
WGK Germany  1
RTECS  GR8575000
10
Autoignition Temperature 797 °F
TSCA  Yes
HazardClass  3
PackingGroup  III
HS Code  29027000
Safety Profile
Moderately toxic by ingestion. Mdly toxic by inhalation and skincontact. Human systemic effects by inhalation: an antipsychotic, unspecified changes in the sense of smell and respiratory system. An eye and skin irritant. Potential narcotic action. Central nervous system depressant. There is no apparent difference between the toxicity of natural cumene and that derived from petroleum. See also BENZENE and TOLUENE. Flammable liquid when exposed to heat or flame; can react with oxidizing materials. Violent reaction with HNO3, oleum, chlorosulfonic acid. To fight fKe, use foam, CO2, dry chemical.
Hazardous Substances Data 98-82-8(Hazardous Substances Data)
Toxicity
LD50 orally in rats: 2.91 g/kg (Smyth)
IDLA 900 ppm [10% LEL]

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