Terbufos
Structural Formula Vector Image
Title: Terbufos
CAS Registry Number: 13071-79-9
CAS Name: Phosphorodithioic acid S-[[(1,1-dimethylethyl)thio]methyl] O,O-diethyl ester
Additional Names: phosphorodithioic acid S-[(tert-butylthio)methyl] O,O-diethyl ester
Manufacturers' Codes: AC-92100
Trademarks: Counter (BASF)
Molecular Formula: C9H21O2PS3
Molecular Weight: 288.43
Percent Composition: C 37.48%, H 7.34%, O 11.09%, P 10.74%, S 33.35%
Literature References: Organophosphate insecticide. Prepn: Ikeda et al.; Takahashi et al., JP 66 16799; JP 67 1743; JP 67 4455 (all to Hokko), C.A. 66, 18510p, 85467p, 67, 11205e (all 1967). As insecticidal soil treatment: F. M. Gordon, DE 2258528 (1973 to Am. Cyanamid), C.A. 79, 62601m (1973). Toxicity to birds: E. F. Hill, M. B. Camardese, Ecotoxicol. Environ. Saf. 8, 551 (1984).
Properties: Technical product (85 to 88% purity): clear, colorless to pale yellow liq, d24 1.105. bp0.01 69°. mp -29.2°. Flash pt 88°C (tag open cup). Sol in acetone, alcs, aromatic and chlorinated hydrocarbons. Soly in water: 10-15 ppm. LD50 orally in quail: 15 mg/kg (Hill, Camardese).
Melting point: mp -29.2°
Boiling point: bp0.01 69°
Flash point: Flash pt 88°C (tag open cup)
Density: d24 1.105
Toxicity data: LD50 orally in quail: 15 mg/kg (Hill, Camardese)
CAUTION: Cholinesterase inhibitor.
Use: Soil insecticide.

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