3056. o-Dichlorobenzene

Nomenclature

CAS number: 95-50-1
1,2-Dichlorobenzene; orthodichlorobenzene.
C6H4Cl2; mol wt 147.00.
C 49.02%, H 2.74%, Cl 48.24%.

Description and references

Prepn and separation from m- and p-dichlorobenzenes, see m-isomer above. Manuf: 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: Rev. Environ. Contam. Toxicol. 106, 51-68 (1988).

Properties

Liquid, bp 180.5°. mp -17.03°. d420 1.3059, d425 1.3003. nD20 1.5515, nD25 1.5491. Flash pt, closed cup: 151°F (66°C). Vapor pressure (25°) 1.56 mm Hg. Log P (olive oil:water) 3.65. Soly in water 145 mg/L. Miscible with alc, ether, benzene.

Caution

Potential symptoms of overexposure are irritation of nose and eyes; liver and kidney damage; skin blisters. See NIOSH Pocket Guide to Chemical Hazards (DHHS/NIOSH 97-140, 1997) p 96. Exposure to high concentrations may result in CNS depression. See Patty's Industrial Hygiene and Toxicology vol. 2B, G. D. Clayton, F. E. Clayton, Eds. (Wiley-Interscience, New York, 3rd ed., 1981) pp 3611-3617.

Use

Solvent for waxes, gums, resins, tars, rubbers, oils, asphalts; insecticide for termites and locust borers; fumigant; deodorizer; removing sulfur from illuminating gas; as degreasing agent for metals, leather, wool; as ingredient of metal polishes; as heat transfer medium; as intermediate in the manuf of dyes.