Pyridaphenthion

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Chemical Identification | General Product Information | Physical & Safety Data

Chemical Identification

Common Name

Pyridaphenthion

中文通用名

哒嗪硫磷

IUPAC

O-(1,6-dihydro-6-oxo-1-phenylpyridazin-3-yl) O,O-diethyl phosphorothioate

CAS

O-(1,6-dihydro-6-oxo-1-phenyl-3-pyridazinyl) O,O-diethyl phosphorothioate

CAS No.

119-12-0

Molecular Formula

C₁₄H₁₇N₂O₄PS

Molecular Structure

General Product Information

Category

Insecticides > Organophosphorus insecticides

Activity

Insecticide, acaricide

Premix

Pyridaphenthion+methomyl+fenvalerate
Pyridaphenthion+fenvalerate

Physical & Safety Data

Physical Properties

Molecular weight:340.3; Physical form:Pale yellow solid. Density:1.325 (20 °C); Melting point:54.5-56.0 °C; Vapour pressure:0.00147 mPa (20 °C); Henry constant:5.00 × 10-6 Pa m3 mol-1 ( calc.); Partition coefficient(n-octanol and water):logP = 3.2; Solubility:In water 100 ppm (20 °C). In acetone 3.77, methanol 2.66 (both in kg/ kg, 21 °C); in diethyl ether 1.01 kg/ kg (25 °C).

Toxicology

Oral:Acute oral LD₅₀ for male rats 769, female rats 850, mice 459, dogs >12 000 mg/ kg. Percutaneous:Acute percutaneous LD₅₀ for male rats 2300, female rats 2100 mg/kg. Non-irritating to skin (rabbits). Inhalation: LC₅₀ (4 h) for rats >1133.3 mg/m³.

Environmental Profile

Ecotoxicology:
Bees: LD₅₀ 0.08 ×g/bee.Birds:Acute oral LD₅₀ for Japanese quail 68 mg/ kg.Daphnia: TLm (3 h) 0.02 mg/l.Fish: TLm (48 h) for carp 12 ppm.

Environmental fate:
Animals:In mice and rats, the parent compound, O-ethyl-O-(3-oxo-2-phenyl-2H-pyridazine-6-yl) phosphorothioate and the corresponding phosphate are found.Soil:Soil DT₅₀ 11-24 d.Plant:In rice, phenyl maleic hydrazide, O,O-diethyl thiophosphoric acid, and PMH glycoside are formed. WATER SOLUBILITY: 100 ppm at 20°C

Transport Information

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