Gray white powder, taste slightly bitter, odorless. The relative density is 1.01~1.02, soluble in ethanol, acetone, chloroform, slightly soluble in benzene, insoluble in gasoline and water.

White or off-white powder, bitter, density of 1.12~1.20g/cm3, soluble in ethanol, acetone and benzene, slightly soluble in carbon tetrachloride, stable in air.

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.

White or light yellow powder, density of 1.24g/cm3, soluble in carbon disulfide, benzene, chloroform, insoluble in water. Storage stability.

Gray white or light yellow powder, tasteless, soluble in hot chloroform, hot benzene, insoluble in acetone, carbon tetrachloride, ethanol and water. Slightly soluble in gasoline, benzene, toluene, hot alcohol.

White or light yellow powder, non-toxic, tasteless, soluble in dilute alkali, carbon disulfide, benzene, acetone and dichloromethane, slightly soluble in chloroform, insoluble in ethanol, carbon tetrachloride, ethyl acetate.

Light yellow or yellow powder, molecular weight is 721, density (20 ℃) is 1.48g/cm3, bulk density is 0.32~0.36g/cm3, soluble in chloroform, benzene and carbon disulfide, slightly soluble in ethanol and gasoline, insoluble in water.

Dark brown powder. Slightly smells. The relative density of 1.70~1.78g/3. The decomposition temperature is greater than 245.0°C. Insoluble in water, ethanol and gasoline, soluble in acetone, benzene and chloroform. Storage stability.

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