| | CHLOROBENZILATE Basic information |
| | CHLOROBENZILATE Chemical Properties |
| Melting point | 37-38℃ | | Boiling point | bp0.04 146-148° | | density | 1.332 | | refractive index | 1.5727 | | storage temp. | 0-6°C | | pka | 11.11±0.29(Predicted) | | form | neat | | Water Solubility | 13mg/L(20 ºC) | | Merck | 13,2141 | | Stability: | Stable. Combustible. Incompatible with strong oxidizing agents, strong acids, alkalies, lime. | | CAS DataBase Reference | 510-15-6(CAS DataBase Reference) | | IARC | 3 (Vol. 30, Sup 7) 1987 | | EPA Substance Registry System | Chlorobenzilate (510-15-6) |
| | CHLOROBENZILATE Usage And Synthesis |
| Description | Chlorobenzilate is an organochlorine pesticide belonging to
the same class as dichlorodiphenyltrichloroethane (DDT).
It was originally developed by Ciba–Geigy and introduced
in 1952. | | Chemical Properties | viscous yellow liquid or pale yellow crystals | | Chemical Properties | Ethyl 4,40
-dichlorobenzilate is a yellow solid
when pure. The technical product is a brownish liquid. | | Uses | The primary use of chlorobenzilate is as an acaricide for mite
control on citrus crops and in beehives. It has a narrow
insecticidal action, killing only mites and ticks. Historically,
chlorobenzilate was used as a synergist for DDT. Although
now banned for use in the United States and Europe, it is
believed to be used on crops other than citrus in other
countries. | | Uses | Acaricide in spider-mite control; synergist for DDT. | | Uses | Nonsystemic pesticide and acaricide. | | Definition | ChEBI: Chlorobenzilate is a diarylmethane. | | General Description | Viscous yellow liquid or pale yellow crystals. Light brown crystalline solid. | | Air & Water Reactions | Insoluble in water. | | Reactivity Profile | CHLOROBENZILATE is hydrolyzed by alkalis and strong acids. Incompatible with lime . | | Health Hazard | Moderately toxic by oral route; toxic symptoms similar to DDT and Perthane; ingestionof large dose can produce nausea, vomiting,tremor and convulsions; skin or eye contactcan cause irritation; application of 25 mgproduced moderate irritation of eye inrabbits; adequate evidence of carcinogenicityin experimental animals; produced tumors inrats and mice; evidence of carcinogenicity inhumans remains unknown.
LD50 oral (rat): 700 mg/kg
LD50 oral (mouse): 729 mg/kg. | | Fire Hazard | Flash point data for CHLOROBENZILATE are not available; however, CHLOROBENZILATE is probably combustible. | | Safety Profile | Suspected carcinogen
with experimental carcinogenic,
neoplastigenic, and tumorigenic data.
Moderately toxic by ingestion. A skin and
eye irritant. A pesticide. When heated to
decomposition it emits toxic fumes of Cl-. | | Potential Exposure | It is a buffer in many chemical intermediates; an organochlorine miticide; to kill mites, ticks,
and other insects; as a synergist for DDT.
Incompatibilities: Strong acids, strong bases; lime. | | Environmental Fate | Biological. Rhodotorula gracilis, a yeast isolated from an insecticide-treated soil,
degraded chlorobenzilate in a basal medium supplemented by sucrose. Metabolites identified by this decarboxylation process were 4,4′-dichlorobenzilic acid, 4,4′-dichlorobenzophenone and carbon dioxide (Miyazaki et al., 1969, 1970).
Soil. Though no products were identified, the half-life of chlorobenzilate in two fine
sandy soils was estimated to be 1.5–5 weeks (Wheeler, 1973).
Photolytic. Chlorobenzilate should not undergo direct photolysis since it does not
absorb UV light at wavelengths greater than 290 nm (Gore et al., 1971). | | Shipping | UN2996 Organochlorine pesticides, liquid, toxic,
Hazard Class: 6.1; Labels: 6.1-Poisonous materials.UN2761
Organochlorine pesticides, solid, toxic, Hazard Class: 6.1;
Labels: 6.1-Poisonous materials. | | Toxicity evaluation | The historical use of chlorobenzilate resulted in its release into
the environment. It has low water solubility (log Kow = 4.74)
and adsorbs strongly to sediment and suspended particulate
matter in aquatic environments. Chlorobenzilate has low soil
mobility due to an estimated Koc of 1500 and thus is not
expected to leach into groundwater. Decomposition via
photolysis or hydrolysis is not considered significant. The halflife
of chlorobenzilate in fine sandy soils was estimated to be
10–35 days, with degradation being primarily microbial. In
silty clay loam and clay soils, the half-life of chlorobenzilate
was estimated to be 10.8–15.1 and 29.5–169.1 days, respectively.
Volatilization from water or soil is not appreciable due
to an estimated Henry’s law constant of 7.2 atmm3 mol-1. If
released into air, chlorobenzilate will exist in both vapor and particulate phases. The half-life of vapor-phase chlorobenzilate
in ambient air was estimated to be 3.2 days. Chlorobenzilate in
the particulate phase is expected to be removed from the
atmosphere by wet or dry deposition. There is no evidence for
long-range transport of chlorobenzilate. Bioaccumulation in
aquatic organisms is moderate to high due to a reported bioconcentration
factor range of 224–709 in fish. | | Waste Disposal | Consult with environmental
regulatory agencies for guidance on acceptable disposal
practices. Generators of waste containing this contaminant
(≥100 kg/mo) must conform to EPA regulations governing
storage, transportation, treatment, and waste disposal. In
accordance with 40CFR165, follow recommendations for
the disposal of pesticides and pesticide containers. Must be
disposed properly by following package label directions or
by contacting your local or federal environmental control
agency, or by contacting your regional EPA office. |
| | CHLOROBENZILATE Preparation Products And Raw materials |
|
