Nanjing Well Pharmaceutical Group Co., Ltd. is engaged in the research, development, production, and sale of pharmaceutical excipients and synthetic lubricating base oils to pharmaceutical companies in China and internationally. Its excipients serve injection, oral, and topical applications, and it also offers active pharmaceutical ingredients such as polidocanol and polyethylene glycol 3350/4000. The company provides a range of synthetic lubricating base oils, additives, and specialty chemicals, as well as products from its Yangzhou well and research institute, including various fatty acids and their esters. Formerly known as Nanjing Well Pharmaceutical Co., Ltd., it changed its name to Nanjing Well Pharmaceutical Group Co., Ltd. in April 2020 and was founded in 2000, based in Nanjing, China.