Overview
25-Dihydroxyvitamin D3, or calcifediol, is a critical metabolite in the vitamin D pathway. It is synthesized in the liver from cholecalciferol (vitamin D3) and serves as a precursor to the active form of vitamin D, calcitriol. This compound is pivotal in maintaining calcium and phosphate balance in the body, which is essential for bone health and neuromuscular function. Calcifediol is widely used in clinical settings to diagnose and treat conditions related to vitamin D deficiency. Its role in bone metabolism makes it a key component in managing renal osteodystrophy and hypoparathyroidism. The compound is typically administered orally or intravenously, depending on the medical condition being treated.
Physical and Chemical Properties
25-Dihydroxyvitamin D3 is a white to off-white crystalline powder with a molecular weight of 400.64 g/mol. It is soluble in organic solvents like ethanol but has limited solubility in water. The compound has a melting point of approximately 80-85°C and should be stored at 2-8°C to maintain stability. The chemical structure of calcifediol includes a hydroxyl group at the 25th carbon position, which enhances its biological activity compared to its precursor, vitamin D3. This modification allows it to be more efficiently converted into calcitriol, the active form of vitamin D, in the kidneys.
Main Applications
The primary application of 25-dihydroxyvitamin D3 is in the treatment of vitamin D deficiency and related disorders. It is particularly effective in managing renal osteodystrophy, a bone disease that occurs in patients with chronic kidney disease. By supplementing calcifediol, healthcare providers can help restore normal calcium and phosphate levels in these patients. Another significant use is in the treatment of hypoparathyroidism, where the body produces insufficient parathyroid hormone. Calcifediol helps compensate for the lack of this hormone by promoting calcium absorption in the intestines and reducing urinary calcium excretion. Additionally, it is used in diagnostic tests to assess vitamin D status in individuals.
Safety and Storage
Handling 25-dihydroxyvitamin D3 requires adherence to safety protocols to avoid exposure. The compound should be stored in a cool, dry place, protected from light and moisture to prevent degradation. Proper labeling and containment are essential to ensure safe usage in clinical and laboratory settings. Exposure to calcifediol can cause irritation to the skin, eyes, and respiratory tract. Personal protective equipment, such as gloves and goggles, should be worn when handling the compound. In case of accidental exposure, immediate medical attention is recommended. Disposal should follow local regulations for pharmaceutical waste.
B2B Procurement Guide
When procuring 25-dihydroxyvitamin D3, it is crucial to source from reputable suppliers who comply with pharmaceutical-grade standards. Buyers should verify the certificate of analysis (CoA) to ensure the product meets specified purity and potency requirements. Price variations can occur based on purity levels, packaging, and supplier location. Bulk purchases may offer cost savings, but storage capacity and shelf life should be considered. Establishing long-term relationships with reliable suppliers can ensure consistent quality and timely delivery. Additionally, buyers should stay informed about regulatory changes affecting the procurement of vitamin D metabolites.
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