熔点 164-168°C slight grey or white crystallized powder "Slight soluble in hot water and glacial acetic acid. Insoluble in cold water. Soluble in organic solvent such as aether and ethanol, also soluble in dilute acid and alkali. Water≦1.0% Melting point:166-168℃ Heavy metal:≦20ppm Purity(HPLC):≧99% Individual impurity:≦0.5% Total impurity:≦1.0%