China High Purity Best Price Pure Vitamin D2 Powder Ergocalciferol Vitamin D2, Find details about China Vitamin, Vitamin D2 from High Purity Best Price Pure Vitamin D2 Powder Ergocalciferol Vitamin D2
PRODUCT SPECIFICATIONS | ||
Product Name: | Vitamin D2 | |
Cas number: | 50-14-6 | |
Molecular formula | C28H44O | |
Standard | USP34 | |
ANALYSIS ITEMS | SPECIFICATION | TEST METHOD |
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 | |
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Examination | Dissolve 10mg of vitmain D2 into 2ml of 90% ethanol, add 2ml solution of digitalis saponin and incubate for 18hours. No precipitation or cloud should be observed. | |
Melting range | 115ºC~119ºC | |
Specific rotation | +103°~+106° | |
SolUBILITY | Freely soluble in alcohol | |
Reducing Substances | <20ppm | |
Assay | 97.0%~103.0% | |
Store condition | Store in airtight container, protected from light, At a temperature between 2~8ºC |