Mevinphos

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Chemical Identification | General Product Information | Physical & Safety Data

Chemical Identification

Common Name

Mevinphos

中文通用名

速灭磷

IUPAC

(EZ)-2-methoxycarbonyl-1-methylvinyl dimethyl phosphate
or
methyl (EZ)-3-(dimethoxyphosphinoyloxy)but-2-enoate

CAS

methyl 3-[(dimethoxyphosphinyl)oxy]-2-butenoate

CAS No.

7786-34-7

Molecular Formula

C₇H₁₃O₆P

Molecular Structure

General Product Information

Category

Insecticides > Organophosphorus insecticides
Acaricides / Miticides > Organophosphorus acaricides

Activity

Insecticide, acaricide

Physical & Safety Data

Physical Properties

Molecular weight:224.1; Physical form:Colourless liquid; ( tech., pale yellow liquid). Density:1.24 (20 °C); (E)- isomer 1.235; (Z)- isomer 1.245; Composition:Tech. contains >60% m/m of the (E)- isomer and c. 20% m/m of the (Z)- isomer. Melting point:(E)- isomer 21 °C; (Z)- isomer 6.9 °C; Vapour pressure:17 mPa (20 °C); Partition coefficient(n-octanol and water):logP = 0.127; Solubility:Completely miscible with water and most organic solvents, e.g. alcohols, ketones, aromatic hydrocarbons, and chlorinated hydrocarbons. Slightly soluble in aliphatic hydrocarbons, petroleum ether, ligroin, and carbon disulfide.; Stability:Stable at ambient temperatures, but hydrolysed in aqueous alkaline solution, DT50 120 d ( pH 6), 35 d ( pH 7), 3 d ( pH 9), 1.4 h ( pH 11).;

Toxicology

(Rat): Oral LD₅₀ 3-12 mg/kg. Inhalation LC₅₀ 9.8 mg/m³/1 hr. Dermal LD₅₀ 51-60 mg/kg. For eyes and skin, not an irritant at very low, nontoxic doses

Environmental Profile

Ecotoxicology:
Bees:Toxic to bees; LD₅₀ 0.027 mg/bee.Birds:Acute oral LD₅₀ for mallard ducks 4.63, chickens 7.52, pheasants 1.37 mg/ kg.Fish: LC₅₀ (48 h) for rainbow trout 0.017, bluegill sunfish 0.037 mg/l.

Environmental fate:
Animals:In mammals, following oral administration, elimination occurs in 3-4 days in the form of metabolites in the urine and faeces.Plant:In plants, hydrolysed rapidly to less toxic products, including phosphoric acid dimethyl ester and phosphoric acid. The (E)- isomer is more rapidly degraded than the (Z)- isomer. Metabolism and degradation have been reviewed (K. I. Beyno

Transport Information

Signal Word:DANGER; Hazard Class:Ia(Extremely hazardous)