9158. Terbufos

Nomenclature

CAS number: 13071-79-9
Phosphorodithioic acid S-[[(1,1-dimethylethyl)thio]methyl] O,O-diethyl ester; phosphorodithioic acid S-[(tert-butylthio)methyl] O,O-diethyl ester; AC-92100; Counter (BASF).
C9H21O2PS3; mol wt 288.43.
C 37.48%, H 7.34%, O 11.09%, P 10.74%, S 33.35%.

Description and 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).

Chemical structure

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).

Caution

Cholinesterase inhibitor.

Use

Soil insecticide.