• Reference standard
High Quality reference standard, API Working Standards are used to help ensure the identity, potency, quality and purity of drug products and drug substances. This is accomplished by analyzing the substance against its qualified reference standard, so the accuracy of reference materials is essential to manufacture quality APIs.
Working Standards can be compendial, referred to as Primary Reference Standard, or a highly characterized in-house standard or a Secondary Reference Standard. Primary Working Standards can be obtained from the standards-setting Pharmacopeias, such as the USP or EP.