O,O-diethyl O-3,5,6-trichloro-2-pyridyl phosphorothioate; ANSI; ISO; BSI; Dowco179; ENT27311; O,O-diethyl-O-(3,5,6-trichloro-2-pyridyl)phos-phorothioate; Clorpyrifos; Phosphorothioic acid O,O-diethyl

O,O-diethyl O-3,5,6-trichloro-2-pyridyl phosphorothioate

C₉H₁₁Cl₃NO₃PS

Form Colourless crystals, with a mild mercaptan odour.

Melting point 42-43.5℃.

Density 1.44 (20℃).

Solubility In water c. 1.4 mg/l (25℃). In benzene 7900, acetone 6500, chloroform 6300, carbon disulfide 5900, diethyl ether 5100, xylene 5000, iso-octanol 790, methanol 450 (all in g/kg, 25℃).

Oral Acute oral LD50 for rats 135-163, guinea pigs 504, rabbits 1000-2000 mg/kg.

Skin and eye Acute percutaneous LD50 for rabbits >5000 mg/kg; for rats >2000 mg/kg.

Inhalation LC50 (4-6 h) for rats >0.2 mg/l (14 ppb).

Control of Coleoptera, Diptera, Homoptera and Lepidoptera in soil or on foliage in over 100 crops, including pome fruit, stone fruit, citrus fruit, nut crops, strawberries, figs, bananas, vines, vegetables, potatoes, beet, tobacco, soya beans, sunflowers, sweet potatoes, peanuts, rice, cotton, alfalfa, cereals, maize, sorghum, asparagus, glasshouse and outdoor ornamentals, turf, and in forestry. Also used for control of household pests (Blattellidae, Muscidae, Isoptera), mosquitoes (larvae and adults) and in animal houses.

Description: Grey brown to white crystals, free from visible extraneous matter;

Active Ingredient Content(w/w): ≥95%;

Water (w/w): ≤0.2%;

Acidity (as H2SO4)(w/w): ≤0.2%;

Acetone Insoluble Material(w/w): ≤0.5%