Quick Details
- ProName: Vitamin D2
- CasNo: 50-14-6
- Molecular Formula: C28H44O
- LimitNum: 0
Superiority
Description :Should be a white needle-shape crystal or white crystal powder ; give out no smell , no taste ; be easy to lose activity in air or ligh…
Details
Description :Should be a white needle-shape crystal or white crystal powder ; give out no smell , no taste ; be easy to lose activity in air or light .
Identification: 1. Dissolve about 0.5mg of vitamin D2 into 5ml chloroform, add 0.3ml acetic anhydride and 0.1ml sulfuric acid, shake and mix vigorously. The mixture is initially produced bright red color , and then rapidly changes violet and finally blue to green . 2. The infrared absorption spectroscopy should be in according with spectrum of comparison
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 Between 115℃ and 119℃
Specific Rotation Between +103゜ and +106゜
Solubility Freely soluble in alcohol
Reducing Substances <20ppm
Ergosterol none
OrganicVolatilityImpurities Benzene ≤ 2 p p m
Assay Between 97 % and 103 %