China High Quality Potassium Stearate Factory - Vitamin D2 | 50-14-6 – COLORKEM
China High Quality Potassium Stearate Factory - Vitamin D2 | 50-14-6 – COLORKEM Detail:
Products Description
Vitamin D (VD for short) is a fat-soluble vitamin. The most important ones are vitamin D3 and D2. Vitamin D3 is formed by ultraviolet radiation of 7-dehydrocholesterol in the human skin, and vitamin D2 is formed by ultraviolet radiation of ergosterol contained in plants or yeast. The main function of vitamin D is to promote the absorption of calcium and phosphorus by the small intestinal mucosal cells, so it can increase the blood calcium and phosphorus concentration, which is conducive to new bone formation and calcification.
Specification
| ITEMS | SPECIFICATION |
| 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 |
| Organic Volatility Impurities | Corresponding using method IV(467) |
Product detail pictures:
Related Product Guide:
That has a sound small business credit, great after-sales service and modern production facilities, we've earned an outstanding standing amid our buyers across the earth for China High Quality Potassium Stearate Factory - Vitamin D2 | 50-14-6 – COLORKEM , The product will supply to all over the world, such as: Anguilla, Argentina, Cairo, Over the years, with high-quality products, first- class service, ultra-low prices we win thee trust and favor of customers. Nowadays our products sell all over the domestic and abroad. Thanks for the regular and new customers support. We provide high quality product and competitive price, welcome the regular and new customers cooperate with us!
By Betty from Honduras - 2017.10.25 15:53
Company director has very rich management experience and strict attitude, sales staff are warm and cheerful, technical staff are professional and responsible,so we have no worry about product,a nice manufacturer.
By Adelaide from Monaco - 2018.06.30 17:29
