Displaying 11 results of Alfacalcidol Impurities Alfacalcidol is a synthetic analogue of Vitamin D that is used to treat various conditions related to calcium and phosphate metabolism. However, during the manufacturing of Alfacalcidol, impurities may be formed which can negatively affect the purity, potency, and safety of the final product. Therefore, it is essential to identify and control the presence of Alfacalcidol impurities during the production process to ensure the quality of the medication.