White or off-white powder, molecular weight of 228.30, relative density of 1.27~1.33, soluble in dimethylformamide, acetone, slightly soluble in benzene, carbon disulfide, chloroform, insoluble in xylene, carbon tetrachloride, alcohol and water.

White crystalline powder, bitter, melting point above 195 ℃, density of 2.00g/cm3, soluble in ethanol, slightly soluble in water. No pollution to the product, storage stability.

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