Acephate

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Chemical Identification | General Product Information | Physical & Safety Data

Chemical Identification

Common Name

Acephate

中文通用名

乙酰甲胺磷

IUPAC

(RS)-(O,S-dimethyl acetylphosphoramidothioate)
or
(RS)-N-[methoxy(methylthio)phosphinoyl]acetamide

CAS

O,S-dimethyl acetylphosphoramidothioate

CAS No.

30560-19-1

Molecular Formula

C₄H₁₀NO₃PS

Molecular Structure

General Product Information

Category

Insecticides > Organophosphorus insecticides

Activity

Insecticide

CropUse

For use on beans, Brussels sprouts, cauliflower, celery, cotton, cranberries, head lettuce, mint, peanuts, peppers, tobacco, ornamentals and forests.

Premix

Imidacloprid+acephate
Fenpropathrin+acephate
Beta-cypermethrin+acephate
Amicarthiazol+Thiram+Acephate
Acephate+Fipronil
Soluble powder, granules. Premix Parters: chlorpyrifos; fenpropathrin;imidacloprid

Physical & Safety Data

Physical Properties

Tech: White solid; strong, pungent, mercaptan-type odor. Melting point 81-91℃. Solubility at room temperature: aromatic solvents <5%; acetone or ethanol >10%.

Toxicology

Tech: (Rat): Oral LD₅₀ 1447 mg/kg (male); 1030 mg/kg (female); Inhalation >61.7 mg/kg. (Rabbit): Dermal LD₅₀ >10,250 mg/kg; Inhalation >14.8 mg/l

Environmental Profile

WATER SOLUBILITY: Room temperature, 65% HAZARDS: Fish: LC₅₀ >1000 ppm (rainbow trout, bluegill). Bird: LD₅₀ 350 mg/kg (mallard); LD₅₀ 140 mg/kg (pheasant). Bee: LC₅₀ 0:2 μg/bee SOIL PARTICLE ADSORPTION: Acephate dissipates rapidly with half-lives of <3 and 7 days in aerobic and anaerobic soils, respectively. Major metabolite was CO₂ in both soil types. TLC and soil column studies indicate acephate is mobile in most soils but that aged residues (excluding acephate and its degradate methamidophos) are immobile in sandy loam soil. Apparently most of the applied acephate and degradate methamidophos degrade to immobile compounds in 20 days.

Transport Information

Signal Word:CAUTION; Hazard Class:III(Slightly hazardous)