Agent Name


CAS Number




Major Category



(Z)-2-Chloro-1-(2,4,5-trichlorophenyl)ethenyl dimethyl phosphate; (Z)-2-Chloro-1-(2,4,5-trichlorophenyl)vinyl dimethyl phosphate; 2,4,5-Trichloro-alpha-(chloromethylene)benzyl alcohol, dimethyl phosphate; 2-Chloro-1-(2,4,5-trichlorophenyl)vinyl dimethyl phosphate; 2-Chloro-1-(2,4,5-trichlorophenyl)vinyl phosphoric acid dimethyl ester; Appex; CVMP; Debantic; Dietreen; Dimethyl 2,4,5-trichloro-alpha-(chloromethylene)benzyl phosphate; Dimethyl-1-(2,4,5-trichlorophenyl)-2-chlorovinyl phosphate; Dust M; Gardcide; Gardona; O-(2-Chlor-1-(2,4,5-trichlorophenyl)vinyl)-O',O''-dimethylphosphate; OMS-595; ROL; Rabon; Rabond; SD 8447; Shell SD 8447; Stirofos; Stirophos; Stitifos; Tetrachlorvinfos; Vinfos; Phosphoric acid, 2-chloro-1-(2,4,5-trichlorophenyl)ethenyl dimethyl ester, (Z)-; Phosphoric acid, 2-chloro-1-(2,4,5-trichlorophenyl)vinyl dimethyl ester, (Z)-; 2-Chloro-1-(2,4,5-trichlorophenyl)vinyl dimethyl phosphate; 2-Chloro-1-(2,4,5-trichlorophenyl)vinyl phosphoric acid dimethyl ester; Benzyl alcohol, 2,4,5-trichloro-alpha-(chloromethylene)-, dimethyl phosphate; Phosphoric acid, 2-chloro-1-(2,4,5-trichlorophenyl)ethenyl dimethyl ester; Phosphoric acid, 2-chloro-1-(2,4,5-trichlorophenyl)vinyl dimethyl ester; [ChemIDplus] UN3077


Organophosphate Insecticides


Colorless or off-white solid with a mild chemical odor; [HSDB]


Used against flies in dairies and livestock barns, ectoparasites on poultry, pests of stored products, and other insects that damage forests, crops, and pastures; [HSDB]


May cause irritation; A cholinesterase inhibitor; Effects in high-dose animal studies include convulsions; [MSDSonline] The average of two baseline respective cholinesterase activity determinations three days apart, with no exposures to enzyme inhibiting pesticides for at least 30 days, is recommended for each worker prior to exposure to cholinesterase inhibitors because of large inter-individual differences in published baseline values. To be established at least once a year. Removal from workplace exposures is recommended until the cholinesterase activity returns to within 20% of baseline. [TLVs and BEIs]

Reference Link

EPA Pesticide Chemical Search

Exposure Assessment

Acetylcholinesterase activity in red blood cells = 70% of individual's baseline; Butylcholinesterase activity in serum or plasma = 60% of individual's baseline; Sample at end of shift; [TLVs and BEIs]

Vapor Pressure

4.2E-8 mm Hg

Lethal Concentration

LC50 (mice) > 1,500 mg/m3/4h

Explanatory Notes

The Guide in the Emergency Response Guidebook is for "Environmentally hazardous substances, solid, n.o.s."

Adverse Effects
Other Poison


IARC Carcinogen

Not Classifiable

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information


Chemical Information

Search ChemIDplus

Biomedical References

Search PubMed

Related Information in HazMap

Occupational diseases associated with exposure to this agent:


Industrial Processes with risk of exposure: