Ausun Pharmaceuticals, also known as Zhejiang Aoxiang Pharmaceutical Co., Ltd., is a pharmaceutical manufacturing company that provides CDMO services for APIs. Founded in 2010, the company is headquartered in Taizhou, Zhejiang, China. Ausun has a large portfolio of APIs available to its clients. Its CDMO services include route design, process development, analytical development, and pilot-to-commercial-scale manufacturing. As of October 2025, the company was out of business.