Injectable egg yolk lecithin is a natural phospholipid mixture extracted and refined from egg yolks, with main components including phosphatidylcholine (PC), phosphatidylethanolamine (PE), and other substances. It appears as an off-white or pale yellow powder or blocky solid, with a slightly slippery feel to the touch. This product is manufactured by Baiyunshan Hanfang and has been filed with the CDE under two registration numbers (F20200000313 and F20190001049, both in Class A status), complying with multiple quality standards, including the Chinese Pharmacopoeia (CP), the United States Pharmacopeia (USP), and the European Pharmacopoeia (EP). As a critical pharmaceutical excipient, it is primarily used as an emulsifier in fat emulsions and can also serve as a structural lipid in liposomal formulations. Backed by mature manufacturing processes, comprehensive compliance credentials, and excellent physicochemical properties, it is widely employed in the production of various injectable p