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warfarine;zoocoumarin,coumarins,3-(A-acetonylbenzyl)4-hydroxycoumarin; 4-hydroxy-3-(3-oxo-1-phenylbutyl)coumarin

3-(3-biphenyl-4-yl-1,2,3,4-tetrahydro-1-naphthyl)-4-hydroxycoumarin

C₁₉H₁₆O₄

Form The racemate forms colourless crystals.

Melting point 161-162℃.

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.

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). Other Organ damage is observed, as well as inhibition of blood coagulation. Only slightly dangerous to humans and domestic animals when used as directed, but care must be taken with young pigs, which are especially susceptible.

Control of rats and mice. There is no tendency to bait-shyness.

Description: White powder, free from visible extraneous matter;

Active Ingredient Content(w/w): ≥98%;

Water (w/w): ≤0.5%; Loss on Drying(w/w): ≤0.5%;

Fineness through 80 mesh sieve: ≥95%