31. Acephate

Nomenclature

CAS number: 30560-19-1
Acetylphosphoramidothioic acid O,S-dimethyl ester; Ortho 12420; Orthene (Valent).
C4H10NO3PS; mol wt 183.17.
C 26.23%, H 5.50%, N 7.65%, O 26.20%, P 16.91%, S 17.51%.

Description and references

Prepn and activity: Magee, US 3716600 and US 3845172 (1973, 1974 both to Chevron).

Chemical structure

Properties

White solid, mp 64-68° (impure). Very sol in water; moderately sol in acetone, alc. Low soly in aromatic solvents. LD50 orally in rats: 700 mg/kg (Magee, 1973).

Use

Contact and systemic insecticide.