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Chemical Identification
Common Name
Cyanophos
中文通用名
杀螟腈
IUPAC
O-4-cyanophenyl O,O-dimethyl phosphorothioate
CAS
O-(4-cyanophenyl) O,O-dimethyl phosphorothioate
CAS No.
2636-26-2
Molecular Formula
C9H10NO3PS
Molecular Structure
Physical Properties
Molecular weight:243.2; Physical form:Yellow to reddish liquid with a faint characteristic odour. Density:1.255-1.265 (25 °C); Flash point:104 °C; Vapour pressure:105 mPa (20 °C); Partition coefficient(n-octanol and water):logP = 2.65 (room temperature); Solubility:In water 46 mg/l (30 °C). In methanol, acetone, chloroform >50% (20 °C). Miscible in alcohols, benzene, chloroform, ketones, toluene, xylene.
Toxicology
Oral:Acute oral LD50 for male rats 710 mg/kg, female rats 730 mg/kg. Percutaneous:Acute percutaneous LD50 for rats >2000 mg/kg. Inhalation: LC50 (4 h) for rats >1500 mg/m3.
Environmental Profile
Ecotoxicology: 
Bees:Toxic to honeybees.Fish: LC50 (48 h) for carp 5 mg/l.  
WATER SOLUBILITY: 46 mg/l at 30° C
Transport Information
Signal Word:CAUTION; Hazard Class:II (Moderately hazardous)

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