SPECTRUM

Chemical Fact Sheet

Chemical Abstract Number (CAS #) 510156
CASRN 510-15-6
SynonymsChlorobenzilate
Ethyl-4,4'-dichlorobenzilate
Benzeneacetic acid, 4-chloro-alpha-(4-chlorophenyl)-alpha-hydroxy, ethyl ester
Acaraben
Benzilan
ECB
Folbex
Analytical Methods EPA Method 508
EPA Method 8081
Molecular FormulaC16H14Cl2O3

Link to the National Library of Medicine's Hazardous Substances
Database for more details on this compound.

Use ACARICIDE IN SPIDER-MITE CONTROL; USED AS A SYNERGIST FOR DDT /SRP: FORMER USE IN USA ON PREMISE & FOR PLANT MITE CONTROL. POOR EFFECTIVENESS VERSUS D GALLINAE ON POULTRY. SRP: FORMER USE IN USA CHLOROBENZILATE WAS ONE OF THE SEVERAL COMPOUNDS WHICH WERE EFFECTIVE AGAINST THE CITRUS RUST MITE PHYLLOCOPTRUTA OLEIVORA. (FORMER USE) ACARICIDE FOR CITRUS CROPS, ORNAMENTALS, COTTON, (NON-CITRUS) FRUITS & NUTS SRP: FORMER USE IN USA
Consumption Patterns ACARICIDE FOR CITRUS, 100% (1982)
Apparent Color Colorless solid (pure)
Boiling Point 146-148 DEG C AT 0.04 MM HG
Melting Point 36 TO 37.3 DEG C
Molecular Weight 325.20
Density 1.2816 G/CU CM AT 20 DEG C
Environmental Impact Chlorobenzilate will enter the environment principally during spraying operations when it is applied as an acaricide (miticide). If released to soil, chlorobenzilate will be expected to exhibit low mobility in soil and, therefore, will not be expected to leach to groundwater. It will not be expected to volatilize from near surface soil or surfaces. It will be subject to biodegradation. The half life of chlorobenzilate in two fine sandy soils was estimated to be 1.5-5 weeks following application of 0.5-1.0 ppm probably due to biodegradation. If it is released to water, chlorobenzilate will be adsorbed by sediment and suspended particulate material. It should not bioconcentrate in aquatic organisms or volatilize. It may be susceptible to biodegradation. In 22 days, 40, 29, and 39% of the chlorobenzilate added to sediment free water samples from 3 fresh water lakes was converted to organic products. Degradation in water from a fourth lake occurred only when glucose and inorganic nutrients were added suggesting that chlorobenzilate may be metabolized in the lake waters. If released to the atmosphere, chlorobenzilate will be susceptible to gas phase reaction with photochemically produced hydroxyl radicals with an estimated half life of about 3.3 hr. Humans may be exposed to chlorobenzilate during spraying operations and from fruit and vegetables which have been treated.
Environmental Fate TERRESTRIAL FATE: If released to soil, chlorobenzilate will be expected to exhibit low mobility in soil(2-4) and, therefore, will not be expected to leach to groundwater. It will not be expected to volatilize from near surface soil or surfaces(2,5). It will be subject to biodegradation . The half life of chlorobenzilate in two fine sandy soils was estimated to be 1.5-5 weeks following application of 0.5-1.0 ppm probably due to biodegradation . AQUATIC FATE: If it is released to water, chlorobenzilate will be adsorbed by sediment and suspended particulate material(2,3,SRC). It should not bioconcentrate in aquatic organisms(2,3,SRC) or volatilize(2-4). It may be susceptible to biodegradation . In 22 days, 40, 29, and 39% of the 14-C-ring-labeled chlorobenzilate added to sediment free water samples from 3 fresh water lakes was converted to organic products but no 14- carbon dioxide evolution was detected . Addition of sediment to the lake waters lead to evolution of 3.6, 0.0, and 18.3% 14-carbon dioxide , respectively . Degradation in water from a fourth lake occurred only when glucose and inorganic nutrients were added suggesting that chlorobenzilate may be metabolized in the lake waters . ATMOSPHERIC FATE: If released to the atmosphere, chlorobenzilate will be susceptible to gas phase reaction with hydroxyl radicals . The rate constant for the vapor phase reaction of chlorobenzilate with photochemically produced hydroxyl radicals has been estimated to be 4.92X10-12 cu cm/molecule-sec at 25 deg C which corresponds to an atmospheric half life of about 3.3 hr at an atmospheric concn of 5X10 5 hydroxyl radicals per cu cm .
Drinking Water Impact 260 Unspecified stations in US (323 samples) 0-66.0 ug/l, 0.44 ug/l avg .

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