Sterile compounding differs from nonsterile compounding (see. Webusp provides official reference standards for active pharmaceutical ingredients and impurities, pharmaceutical analytical impurities (pais), nitrosamine impurities,. This general information chapter is intended to provide general guidance concerning storing,.

good storage and shipping practices. This chapter provides procedures and requirements for compounding sterile preparations. Usp offers over 7,000 usp reference standards, highly characterized physical specimens of drug substances, excipients, food ingredients,.