Vitamin D2 | 50-14-6 : kuv
Khoom Description
Vitamin D (VD luv luv) yog cov vitamin fat-soluble. Qhov tseem ceeb tshaj plaws yog vitamin D3 thiab D2. Vitamin D3 yog tsim los ntawm ultraviolet hluav taws xob ntawm 7-dehydrocholesterol nyob rau hauv tib neeg daim tawv nqaij, thiab vitamin D2 yog tsim los ntawm ultraviolet hluav taws xob ntawm ergosterol muaj nyob rau hauv cov nroj tsuag los yog poov xab. Lub luag haujlwm tseem ceeb ntawm vitamin D yog los txhawb kev nqus ntawm calcium thiab phosphorus los ntawm lub plab hnyuv mucosal hlwb, yog li nws tuaj yeem ua rau cov ntshav calcium thiab phosphorus concentration, uas yog qhov tsim nyog rau kev tsim cov pob txha tshiab thiab calcification.
Specification
| Yam khoom | SPECIFICATION |
| Qhov tshwm sim | Ua tau raws li qhov yuav tsum tau ua |
| Kev txheeb xyuas | Ua tau raws li qhov yuav tsum tau ua |
| Kev tshuaj xyuas | Dissolve 10mg ntawm vitamin D2 rau hauv 2ml ntawm 90% ethanol, ntxiv 2ml tov ntawm digitalis saponin thiab incubate rau 18 teev. Yuav tsum tsis txhob muaj nag lossis daus. |
| Melting Range | 115-119 ° C |
| Kev sib hloov tshwj xeeb | +103 ° ~ + 106 |
| Solubility | Dawb soluble hauv cawv |
| Txo cov tshuaj | Max 20 ppm |
| Ergosterol | tsis muaj |
| Organic Volatility Impurities | Kev siv txoj kev IV (467) |
