Calcitriol Impurities A is primarily used in the pharmaceutical industry for quality control and analytical purposes. It serves as a reference standard in the development and validation of methods to detect and quantify impurities in calcitriol drug substances and products. By ensuring the accurate identification and measurement of this impurity, manufacturers can maintain the safety, efficacy, and compliance of calcitriol-based medications with regulatory standards. Additionally, it aids in research studies focused on understanding the degradation pathways and stability of calcitriol formulations.