Title: Cumene
CAS Registry Number: 98-82-8
CAS Name: (1-Methylethyl)benzene
Additional Names: cumol; isopropylbenzene
Molecular Formula: C9H12
Molecular Weight: 120.19
Percent Composition: C 89.94%, H 10.06%
Literature References: Manuf: Faith, Keyes & Clark's Industrial Chemicals, F. A. Lowenheim, M. K. Moran, Eds. (Wiley-Interscience, New York, 4th ed., 1975) pp 294-297. Toxicity study: Smyth et al., Arch. Ind. Hyg. Occup. Med. 4, 119 (1951). Review: D. J. Ward in Kirk-Othmer Encyclopedia of Chemical Technology vol. 7 (Wiley-Interscience, New York, 3rd ed., 1979) pp 286-290.
Properties: Colorless liquid. d420 0.862. bp 152-153°. Flash pt, closed cup: 102°F (39°C). nD20 1.4914: Hirschler, Faulconer, J. Am. Chem. Soc. 68, 210 (1946). Insol in water. Sol in alcohol and many other organic solvents. LD50 orally in rats: 2.91 g/kg (Smyth).
Boiling point: bp 152-153°
Flash point: Flash pt, closed cup: 102°F (39°C)
Index of refraction: nD20 1.4914: Hirschler, Faulconer, J. Am. Chem. Soc. 68, 210 (1946)
Density: d420 0.862
Toxicity data: LD50 orally in rats: 2.91 g/kg (Smyth)
CAUTION: Potential symptoms of overexposure are irritation of eyes, skin and mucous membranes; dermatitis; headache, narcosis, coma. See NIOSH Pocket Guide to Chemical Hazards (DHHS/NIOSH 97-140, 1997) p 80.
Use: In manuf of phenol, acetone, acetophenone, a-methylstyrene.
Cumic Acid Cumic Alcohol Cumidine Cupferron Cupreine

Skeletal formula of cumene Ball-and-stick model of cumene
CAS number 98-82-8 YesY
PubChem 7406
ChemSpider 7128 YesY
KEGG C14396 YesY
ChEBI CHEBI:34656 YesY
RTECS number GR8575000
Jmol-3D images Image 1
Molecular formula C9H12
Molar mass 120.19 g mol−1
Appearance colorless liquid
Odor sharp, gasoline-like
Density 0.862 g cm−3, liquid
Melting point −96 °C; −141 °F; 177 K
Boiling point 152 °C; 306 °F; 425 K
Solubility in water negligible
Solubility soluble in acetone, ether, ethanol
Refractive index (nD) 1.4915 (20 °C)
Viscosity 0.777 cP (21 °C)
R-phrases R10,R37,R51/53,R65
S-phrases S24,S37,S61,S62
Main hazards flammable
NFPA 704
NFPA 704.svg
Flash point 43 °C; 109 °F; 316 K
Autoignition temperature 424 °C; 795 °F; 697 K
Explosive limits 0.9-6.5%
Related compounds
Related compounds ethylbenzene
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Cumene is the common name for isopropylbenzene, an organic compound that is based on an aromatic hydrocarbon with an aliphatic substitution. It is a constituent of crude oil and refined fuels. It is a flammable colorless liquid that has a boiling point of 152 °C. Nearly all the cumene that is produced as a pure compound on an industrial scale is converted to cumene hydroperoxide, which is an intermediate in the synthesis of other industrially important chemicals, primarily phenol and acetone.