China (Mainland) 
vitamin d2 cas: 50-14-6 for preventing bone loss white raws 99% purity
quick details:
vitamin d2 cas: 50-14-6 for preventing bone loss white raws 99% purity
english name: vitamin d2
mf:c28h44o
mw:396.65
cas:50-14-6
appearance: white powder
moq: 1g
packing: 50g/bag
deliivery time: 4~7 working days
coa:
| product name | vitamin d 2 | |||
| cas no. | 50-14-6 | outer packing 50g*20 / bag | ||
| production date | 2016.12.28 | shelf life | 2018.12.14 | |
| standard adopted | 40,000,000iu/g of vitamin d2 (ep) | |||
| items of analysis | specification | results | ||
| appearance | white crystalline powder | conforms | ||
| identification | ir | conforms | ||
| ergosterol | ≤0.2% | conforms | ||
| specific rotation | +103°-+106° | +106.2° | ||
| reducing matter | ≤20ppm | conforms | ||
| assay | 97-103% | 98.63% | ||
| conclusion | qualified | |||
background:
vitamin d is found in many foods, including fish, eggs, fortified milk, and cod liver oil. the sun also adds to the body's daily production of vitamin d, and as little as 10 minutes of exposure is thought to prevent deficiency.
the term "vitamin d" refers to several different forms of this vitamin. two forms are important in humans: vitamin d2, which is made by plants, and vitamin d3, which is made by human skin when exposed to sunlight. foods may be fortified with vitamin d2 or d3.
the major role of vitamin d is to maintain normal blood levels of calcium and phosphorus. vitamin d helps the body absorb calcium, which forms and maintains strong bones. it is used alone or together with calcium to improve bone health and decrease fractures. vitamin d may also protect against osteoporosis, high blood pressure, cancer, and other diseases.
uses:
vitamin d (ergocalciferol-d2, cholecalciferol-d3, alfacalcidol) is a fat-soluble vitamin that helps your body absorb calcium and phosphorus. having the right amount of vitamin d, calcium, and phosphorus is important for building and keeping strong bones. vitamin d is used to treat and prevent bone disorders (such as rickets, osteomalacia). vitamin d is made by the body when skin is exposed to sunlight. sunscreen, protective clothing, limited exposure to sunlight, dark skin, and age may prevent getting enough vitamin d from the sun.
vitamin d with calcium is used to treat or prevent bone loss (osteoporosis). vitamin d is also used with other medications to treat low levels of calcium or phosphate caused by certain disorders (such as hypoparathyroidism, pseudohypoparathyroidism, familial hypophosphatemia). it may be used in kidney disease to keep calcium levels normal and allow normal bone growth.
vitamin d2 vs vitamin d3:
supplemental vitamin d is available in 2 distinct forms: ergocalciferol (vitamin d2) and cholecalciferol (vitamin d3). pharmacopoeias have officially regarded these 2 forms as equivalent and interchangeable, yet this presumption of equivalence is based on studies of rickets prevention in infants conducted 70 y ago. the emergence of 25-hydroxyvitamin d as a measure of vitamin d status provides an objective, quantitative measure of the biological response to vitamin d administration. as a result, vitamin d3 has proven to be the more potent form of vitamin d in all primate species, including humans. despite an emerging body of evidence suggesting several plausible explanations for the greater bioefficacy of vitamin d3, the form of vitamin d used in major preparations of prescriptions in north america is vitamin d2. the case that vitamin d2 should no longer be considered equivalent to vitamin d3 is based on differences in their efficacy at raising serum 25-hydroxyvitamin d, diminished binding of vitamin d2 metabolites to vitamin d binding protein in plasma, and a nonphysiologic metabolism and shorter shelf life of vitamin d2. vitamin d2, or ergocalciferol, should not be regarded as a nutrient suitable for supplementation or fortification.
what is the most important information i should know about vitamin d2 (ergocalciferol)
do not use this medication if you have ever had an allergic reaction to vitamin d, or if you have high levels of calcium or vitamin d in your blood, or if you have any condition that makes it hard for your body to absorb nutrients from food (malabsorption).
before you take this medication, tell your doctor if you are allergic to any drugs or dyes, or if you have heart disease, coronary artery disease, kidney disease, or an electrolyte imbalance.
do not take other vitamin or mineral supplements unless your doctor has told you to.
avoid using calcium supplements or antacids without your doctor's advice. use only the specific type of supplement or antacid your doctor recommends. tell your doctor about all medications you use. this includes prescription, over-the-counter, vitamin, and herbal products. do not start a new medication without telling your doctor.