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Chemical Identification
Common Name
Chloramben
中文通用名
草灭畏
IUPAC
3-amino-2,5-dichlorobenzoic acid
CAS
3-amino-2,5-dichlorobenzoic acid
CAS No.
133-90-4
Molecular Formula
C7H5Cl2NO2
Molecular Structure
Physical Properties
Molecular weight:206.0; Physical form:Colourless crystals. Melting point:200-201 °C; Vapour pressure:930 mPa (100 °C); Solubility:In water 700 mg/l (25 °C). In dimethylformamide 1206, acetone, methanol 223, ethanol 173, isopropanol 113, diethyl ether 70, chloroform 0.9, benzene 0.2 (all in g/kg, room temperature). Insoluble in carbon tetrachloride.; Stability:Thermally stable up to the boiling point. Stable to oxidising agents, acids and alkalis. Decomposed by sodium hypochlorite solutions. Sensitive to light.
Toxicology
Oral:Acute oral LD50 for rats >5000 mg/kg. Percutaneous:Acute percutaneous LD50 for rats >3160 mg/kg. Mild skin and eye irritant (rabbits).
Environmental Profile

Ecotoxicology:
Bees:Not toxic to bees.Birds:Dietary LC50 (8 d) for mallard ducks 4640 mg/kg.Fish:Not toxic to fish. Environmental fate: 
Animals:In rats, the major metabolites were 3-amino-5-chlorobenzoic acid, 3-aminobenzoic acid, 2,5-dihydroxybenzoic acid, 3,5-dihydroxybenzoic acid and 2,5-dichloroaniline.Soil:Undergoes microbial degradation in soil. Duration of activity is c. 6-8 w.Plant:In plants, chloramben is converted to a highly stable N-glucoside, which retards further degradation.

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

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