USP will be upgrading our system. As a result, the USP Store will be unavailable for ordering during the mentioned time above.
We apologize in advance for any inconvenience this may cause.
USP currently offers more than 3,100 Reference Standards—highly characterized specimens of drug substances, excipients, food ingredients, impurities, degradation products, dietary supplements, compendial reagents, and performance calibrators. USP Reference Standards are specified for use in conducting official USP–NF tests and assays. USP also provides Reference Standards specified in the Food Chemicals Codex as well as authentic substances—high-quality chemical samples—as a service to analytical, clinical, pharmaceutical, and research laboratories.
USP's Reference Standards are used in more than 140 countries around the world. USP also collaborates with the World Health Organization in its program to provide international biological standards and chemical reference materials for antibiotics, biologics, and chemotherapeutic agents. Some items are standardized in terms of the corresponding international standards.
USP's Reference Standard portfolio now includes CRMs, which are Reference Standards that have undergone additional metrologically based testing and statistical analysis to meet both USP's stringent criteria and guidelines established by the International Organization for Standardization (ISO). Learn more about CRMs.
USP Reference Standards are used to demonstrate identity, strength, purity, and quality for medicines, dietary supplements, and food ingredients. Common applications include