維生素 D2

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外觀	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)

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