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商品说明
Brief introduction: At present, there are at least 10 known types of vitamin D, but the most important ones are vitamin D2 (ergocalciferol) and vitamin D3 (bile calcifying aldehyde). Vitamin D2 is produced from ergosterol in plants by ultraviolet radiation, but its stock in nature is very small. Vitamin D3 is formed by the conversion of 7-dehydrocholesterol contained in the human epidermis and dermis through ultraviolet radiation in sunlight. The safety of vitamin D2 is better than that of vitamin D3. 商品参数
Chemical properties: White needle shaped crystalline or crystalline powder, odorless and odorless. Mp115-118 ℃ (decomposition), specific rotation[ α] At 20D+102.5 ° (ethanol), the ethanol solution of this product exhibits maximum absorption at a wavelength of 265nm. Easily soluble in ethanol (1:2), ether (1:2 Chemicalbook), acetone (1:10), and chloroform (1:0.7), insoluble in water. Reduced activity when exposed to oxygen or light. Purpose: Food additives: nutritional enhancers; Biochemical research; Clinical drugs belong to the category of fat soluble vitamins, which promote the absorption of calcium and phosphorus in the intestine and help with bone calcification. They are clinically used to prevent and treat pediatric rickets and adult osteomalacia. |
