There are three isomeric forms of dichlorobenzene (DCB):
m-DCB is a flammable liquid and vapor.
ChEBI: 1,2-dichlorobenzene is a dichlorobenzene carrying chloro substituents at positions 1 and 2. It has a role as a hepatotoxic agent and a metabolite.
The major uses of o-DCB are as
a process solvent in the manufacturing of toluene diisocyanate and as an intermediate in the synthesis of dyestuffs,
herbicides, and degreasers. p-Dichlorbenzene is used
primarily as a moth repellant, a mildew control agent;
space deodorant; and in insecticides, which accounts for
90% of the total production of this isomer. Information is
not available concerning the production and use of m-DCB.
However, it may occur as a contaminant of o-or p-DCB
formulations. Both o-and p-isomers are produced almost
entirely as by-products during the production of
monochlorobenzene
m-DCB: UN2810 Toxic liquids, organic, n.o.s.,
Hazard Class: 6.1; Labels: 6.1-Poisonous materials,
Technical Name Required. United States DOT Regulated
Marine Pollutant. UN3077 Environmentally hazardous
substances, solis, n.o.s., Hazard class: 9; Labels:
9-Miscellaneous hazardous material, Technical NameRequired. UN3082 Environmentally hazardous substances,
liquid, n.o.s., Hazard class: 9; Labels: 9-Miscellaneous hazardous material, Technical Name Required
For o-DCB and m-DCB: acid fumes,
chlorides, strong oxidizers; hot aluminum, or aluminum
alloys. For p-DCB: Strong oxidizers; although, incompatibilities for this chemical may also include other materials
listed for o-DCB.
Incineration, preferably
after mixing with another combustible fuel. Care must be
exercised to assure complete combustion to prevent
the formation of phosgene. An acid scrubber is necessary
to remove the halo acids produced. Consult with
environmental regulatory agencies for guidance on
acceptable disposal practices. Generators of waste containing
this contaminant (≥100 kg/mo) must conform with EPA
regulations governing storage, transportation, treatment, and
waste disposal
