9631. 1,2,4-Trichlorobenzene

Nomenclature

CAS number: 120-82-1
unsym-Trichlorobenzene.
C6H3Cl3; mol wt 181.45.
C 39.72%, H 1.67%, Cl 58.62%.

Description and references

Prepd from 2,4-dichloroaniline or 2,5-dichloroaniline or 3,4-dichloroaniline by diazotization and treatment with Cu2Cl2: Beilstein, Kurbatow, Ann. 192, 230 (1878); van der Lande, Rec. Trav. Chim. 51, 104, 110 (1932); from 1,3-diaminobenzene by tetrazotization and treatment with Cu2Cl2: Cohn, Fischer, Monatsh. Chem. 21, 278 (1900).

Chemical structure

Properties

Liquid; mp 17°; d2525 1.4634; bp 213°; nD25 1.5524. Flash pt 110°C (230°F). Volatile with steam. Insol in water. Sparingly sol in alc. Miscible with ether, benzene, petr ether, carbon disulfide.

Caution

Potential symptoms of overexposure are irritation of eyes, skin, mucous membranes. See NIOSH Pocket Guide to Chemical Hazards (DHHS/NIOSH 97-140, 1997) p 314.

Use

Solvent. Prepn of standards.