Tolclofos-methyl

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Chemical Identification | General Product Information | Physical & Safety Data

Chemical Identification

Common Name

Tolclofos-methyl

中文通用名

甲基立枯磷

IUPAC

O-2,6-dichloro-p-tolyl O,O-dimethyl phosphorothioate

CAS

O-(2,6-dichloro-4-methylphenyl) O,O-dimethyl phosphorothioate

CAS No.

57018-04-9

Molecular Formula

C₉H₁₁Cl₂O₃PS

Molecular Structure

General Product Information

Category

Fungicides > Organophosphorus fungicides

Activity

Fungicide

Premix

Wettable powder, dust, flowable. Premix Parters: amitraz;

Physical & Safety Data

Physical Properties

Molecular weight:301.1; Physical form:Colourless crystals; ( tech., colourless to light brown solid). Melting point:78-80 °C; Flash point:210 °C (Cleveland open cup); Vapour pressure:57 mPa (20 °C); Partition coefficient(n-octanol and water):logP = 4.56 (25 °C); Solubility:In water 1.10 ppm (25 °C). In hexane 3.8%, xylene 36.0%, methanol 5.9%.; Stability:Stable to light, heat and moisture. Decomposed in alkaline and acidic media.;

Toxicology

Oral:Acute oral LD₅₀ for rats 5000 mg/kg. Percutaneous:Acute percutaneous LD₅₀ for rats >5000 mg/kg. Non-irritating to skin and eyes (rabbits). Inhalation: LC₅₀ for rats >3320 mg/m³.

Environmental Profile

Ecotoxicology:
Birds:Acute oral LD₅₀ for mallard ducks and bobwhite quail >5000 mg/kg.Fish: LC₅₀ (96 h) for bluegill sunfish >720 µg/l.

Environmental fate:
Animals:In mammals, tolclofos-methyl is rapidly metabolised mainly by oxidative desulfuration of the P=S group to a P=O group, oxidation at the 4-methyl group, and cleavage of the P-O-aryl and P-O-methyl linkages. Excretion is rapid, and is substantially completeSoil:Persistent in the soil, based on a balance between rapid biodegradability and high physicochemical stability. Photolytically degraded (8 h sunlight/d), DT₅₀ 44 d in water, 15-28 d in lake and river water, <2 d on the soil surfac

Transport Information

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