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Chemical Identification
Common Name
Quinalphos
中文通用名
喹硫磷
IUPAC
O,O-diethyl O-quinoxalin-2-yl phosphorothioate
CAS
O,O-diethyl O-2-quinoxalinyl phosphorothioate
CAS No.
13593-03-8
Molecular Formula
C12H15N2O3PS
Molecular Structure
Category
Activity

Insecticide, Acaricide

Premix
Quinalphos+fenvalerate
Quinalphos+deltamethrin
Cypermethrin+quinalphos
Beta-cypermethrin+quinalphos
Emulsifiable concentrate, ULV, granular, dust, wettable powder.
Premix Parters:
chloridazon; chloridazon phenmedipham; metazachlor.
Physical Properties
Made by the reaction of ophenylenediamine, chloroacetic acid & O,O-diethyl phosphorochloridothioate; pure is a colorless crystalline solid. Melting point 31°-32°C; vapor pressure 3 x 10-6 Torr at 20°C; specific gravity d 20/4°C = 1.235, refractive index 1.5624 (supercooled melt). Stable under ambient storage conditions, when diluted in nonpolar organic solvents, and in presence of stabilizing agents. Susceptible to hydrolysis. Soluble in toluene, xylene, and other aromatic hydrocarbons, diethyl ether, ethylacetate, acetone, acetonitrile, methanol, and ethanol slightly soluble in light petroleum.
Toxicology
Oral Acute oral LD50 for male rats 71 mg/kg. Skin and eye Acute percutaneous LD50 for male rats 1750 mg/kg. Non-irritating to skin and eyes (rabbits).Inhalation LC50 (4 h) for rats 0.45 mg/l air.
Environmental Profile
Ecotoxicology
Birds Acute LD50 (14 d) for Japanese quail 4.3, mallard ducks 37 mg/kg. Dietary LC50 (8 d) for quail 66, mallard ducks 220 mg/kg.Fish LC50 (96 h) for carp 3.63, rainbow trout 0.005 mg/l.Daphnia LC50 (48 h) 0.66 g/l. Bees:Very toxic to bees. LD50 (oral) 0.07 g/bee; (topical) 0.17 g/bee.Worms LC50 (7 d) 188 mg/kg soil; (14 d) 118.4 mg/kg soil.
Environmental fate
EHC 63 (WHO, 1986; a general review of organophosphorus insecticides).Animals In rats, following oral administration, rapidly absorbed and metabolised to 2-hydroxyquinoxaline (free and as its conjugates), which are excreted in the urine (c. 87%) and bile (c. 13%) within a short time.Plants In plants, one-third is absorbed by the leaf surface and penetrates into the plant, whilst two-thirds disappears by evaporation within 14 days. The principal metabolite is 2-hydroxyquinoxaline (free and as its conjugates).
Transport Information
Signal Word:WARNING; Hazard Class:II(Moderately hazardous)

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