Title: Chlorobenzene
CAS Registry Number: 108-90-7
Additional Names: Monochlorobenzene; benzene chloride
Molecular Formula: C6H5Cl
Molecular Weight: 112.56
Percent Composition: C 64.02%, H 4.48%, Cl 31.50%
Literature References: Produced by the chlorination of benzene in the presence of a catalyst. Review of manuf, properties, and use: Faith, Keyes & Clark's Industrial Chemicals, F. A. Lowenheim, M. K. Moran, Eds. (Wiley-Interscience, New York, 4th ed., 1975) pp 258-265. Review of toxicology and human exposure: Toxicological Profile for Chlorobenzene (PB91-180505, 1990) 100 pp.
Properties: Colorless, very refractive liquid; faint, not unpleasant odor. d420 1.107. bp 131-132°. Solidif -55°. mp -45°. Flash pt 28°C. nD20 1.5248. Insol in water. Freely sol in alcohol, benzene, chloroform, ether.
Melting point: mp -45°
Boiling point: bp 131-132°
Flash point: Flash pt 28°C
Index of refraction: nD20 1.5248
Density: d420 1.107
CAUTION: Potential symptoms of overexposure are irritation of skin, eyes and nose; drowsiness, incoordination; CNS depression. See NIOSH Pocket Guide to Chemical Hazards (DHHS/NIOSH 97-140, 1997) p 62.
Use: Manuf phenol, aniline, DDT; solvent for paints; heat transfer medium.
Chlorobenzilate Chlorocresol Chlorocyanohydrin Chlorodibromomethane Chlorofluorocarbons

Chlorobenzene2.svg Chlorobenzene
CAS number 108-90-7 YesY
PubChem 7964
ChemSpider 7676 YesY
UNII K18102WN1G YesY
KEGG C06990 YesY
ChEBI CHEBI:28097 YesY
RTECS number CZ0175000
Jmol-3D images Image 1
Molecular formula C6H5Cl
Molar mass 112.56 g/mol
Appearance colorless liquid
Density 1.11 g/cm³, liquid
Melting point −45 °C; −49 °F; 228 K
Boiling point 131 °C; 268 °F; 404 K
Solubility in water 0.5 g l-1 in water at 20 °C
Solubility in other solvents soluble in most organic solvents
MSDS External MSDS
R-phrases R10 R20 R51/53
S-phrases S24/25 S61
NFPA 704
NFPA 704.svg
Flash point 29 °C; 84 °F; 302 K
Related compounds
Related Halobenzenes Fluorobenzene
Related compounds benzene
Supplementary data page
Structure and
n, εr, etc.
Phase behaviour
Solid, liquid, gas
Spectral data UV, IR, NMR, MS
 YesY (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Chlorobenzene is an aromatic organic compound with the chemical formula C6H5Cl. This colorless, flammable liquid is a common solvent and a widely used intermediate in the manufacture of other chemicals.