Chemical Identification
Common Name
Warfarin
中文通用名
杀鼠灵
IUPAC
4-hydroxy-3-[(1RS)-3-oxo-1-phenylbutyl]coumarin
or
(RS)-3-(α-acetonylbenzyl)-4-hydroxycoumarin
CAS
4-hydroxy-3-(3-oxo-1-phenylbutyl)-2H-1-benzopyran-2-one
CAS No.
81-81-2
Molecular Formula
C19H16O4
Molecular Structure
Physical Properties
Molecular weight:308.3g/mol;The racemate forms colourless crystals.Melting point:161-162℃.V.p. 1.5×10-3mPa;Solubility In water 17 mg/l (20℃). Very slightly soluble in benzene,diethyl ether and cyclohexane. Moderately soluble in methanol, ethanol, and isopropanol. In acetone 65, chloroform 56, dioxane 100 (all in g/l, 20℃). Dissolves in aqueous alkalis with the formation of water-soluble salts. Sodium salt: in water up to 400 g/l; insoluble in organic solvents.Stability Very stable, even to strong acids. pKa It is acidic.
Toxicology
Oral Acute oral LD50 for rats 186, mice 374 mg/kg. Oral LD50 for rats 1, pigs 1, cats 3, dogs 3, cattle 200 (all mg/kg daily for 5 days).
Environmental Profile
ECOTOXICOLOGY
Birds Poultry are relatively resistant.

ENVIRONMENTAL FATE
EHC 175 (WHO, 1995) Animals Metabolites in mammals include 4-, 6-, 7-, and 8-hydroxycoumarin (R. F. Lawrence et al., Chirality, 1990, 2, 96; F. A. Sutcliffe et al., Chem. Biol. Interact., 1990, 75, 171).
Transport Information
Hazard Class:o(Highly hazardous)

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