Also known as Na2HPO4, disodium phosphate is used to regulate the pH of liquids. Disodium phosphate can be used as an excipient, such as buffer, chelating agent, etc. Pharmaceutical excipients, or pharmaceutical excipients, refer to other chemical substances used in the pharmaceutical process in addition to pharmaceutical ingredients. Pharmaceutical excipients generally refer to inactive ingredients in pharmaceutical preparations, which can improve the stability, solubility and processability of pharmaceutical preparations. Pharmaceutical excipients also affect the absorption, distribution, metabolism, and elimination of co-administered drugs