Calcitriol Impurities D are primarily used in the pharmaceutical industry for quality control and research purposes. They serve as reference standards in the analysis and identification of impurities present in Calcitriol, a synthetic form of vitamin D3. By understanding and characterizing these impurities, manufacturers can ensure the purity, safety, and efficacy of Calcitriol-based medications. This is crucial in the production of drugs used to treat conditions such as hypocalcemia, secondary hyperparathyroidism, and osteoporosis. Additionally, these impurities aid in the development of robust analytical methods, helping regulatory compliance and improving the overall quality of pharmaceutical products.