USP currently offers more than 3,500 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.
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See the entire current catalog
Explore our entire reference standards catalog–including current and previous lots, valid use dates, prices and more.
New dietary supplements
Reference Standards
More than 300 dietary supplements reference standards are
available. See the newly released botanical
reference standards.
Product-specific standards and performance standards for Biologics
Help ensure the quality and consistency of biological treatments reaching patients globally.
Food ingredient
reference materials
Helping verify the identity, quality and
purity of food ingredients you buy or sell.
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The value of a Reference Standard
Trust the quality standard that sets the benchmark for medicines worldwide. USP offers official methods, specifications and associated Reference Standards that can help your product meet regulatory requirements and patients’ needs.
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Ordering information and subscriber resources