产品描述

Appearance     Meet the requirement
Identification     Meet the requirement
Examination     Dissolve 10mg of vitamin D2 into 2ml of 90% ethanol, add 2ml solution of digitalis saponin and incubate for 18 hours. No precipitation or cloud should be observed.
Melting Range     115 ~ 119°C
Specific Rotation     +103°~+106
Solubility        Freely soluble in alcohol
Reducing Substances     Max 20ppm
Ergosterol        none
OrganicVolatilityImpurities     Corresponding using method IV(467)