2,4-Dichlorophenoxyacetic acid is a white
to yellow crystalline powder with a slight phenolic odor.
2,4-Dichlorophenoxyacetic acid,
was introduced as a plant growth-regulator in 1942. It
is registered in the United States as a herbicide for control
of broadleaf plants and as a plant growth-regulator. Thus,
workers engaged in manufacture, formulation or application
are affected, as may be citizens in areas of application. The
Vietnam war era defoliant, Agent Orange, was a mixture of
2,4-D and 2,4,5-T.
UN3345 Phenoxyacetic acid derivative pesticide,
solid, toxic, Hazard Class: 6.1; Labels: 6.1-Poisonous
materials. A DOT regulated marine pollutant.
A weak acid, incompatible with bases.
Decomposes in sunlight or heat, forming hydrogen chloride
and phosgene. Contact with strong oxidizers may cause fire
and explosions.
Incineration of phenoxys is
effective in 1 second @ 982
C, using a straight combustion
process or @ 482℃
using catalytic combustion. Over 99%
decomposition was reported when small amounts of 2,4-D
were burned in a polyethylene bag. See “References”
for additional detail. In accordance with 40CFR165, follow
(31); recommendations for the disposal of pesticides and
pesticide containers. Must be disposed properly by follow-
ing (100) Package (2) label directions or by contacting
your local or federal environmental control agency, or by
contacting your regional EPA office. Consult with environ-
mental regulatory agencies for guidance on acceptable
disposal practices. Generators of waste containing this
contaminant (≥100 kg/mo) must conform with EPA regu-
lations governing storage, transportation, treatment, and
waste disposal.
