Common name: acephate

IUPAC name:O,S-dimethyl acetylphosphoramidothioate

Chemical Abstracts name: N-[methoxy(methylthio)phosphinoyl]acetanude

CAS RN: 30560-19-1

Molecular formula: C4H10NO3PS

Structural formula:

Molecular weight: 183.2

Form: Colorless crystals; (tech., A colorless solid)

Melting point: 88-90¡æ; (tech, 82-89¡æ)

Vapor pressure: 0.226mPa(24¡æ)

Kow logP=-0.89

S.g./density: 1.35

Solubility: In water 790g/L(20¡æ). In acetone 151, ethanol >100, ethyl acetate 35, benzene 16, hexane 0.1(all in g/L, 20¡æ).

Stability: Relatively stable to hydrolysis; DT50(40¡æ) 60h (pH9), 710h(pH3).