Usp offers over 7,000 usp reference standards, highly characterized physical specimens of drug substances, excipients, food ingredients,. This general information chapter is intended to provide general guidance concerning storing,. This chapter provides procedures and requirements for compounding sterile preparations.

Webusp provides official reference standards for active pharmaceutical ingredients and impurities, pharmaceutical analytical impurities (pais), nitrosamine impurities,. good storage and shipping practices. Sterile compounding differs from nonsterile compounding (see.