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The following list of RSs have been assigned a Valid Use Date of October 31, 2020. Due to revisions to USP General Chapter <11> and General Notices
5.80, which will become official November 1, 2020, users will no longer be able to assume a value of 100.0% for these RS lots in quantitative USP compendial applications. The Valid Use Dates are the day before these revisions become official. If you have any questions, please contact Reference Standards Technical Services at

USP Reference Standards Impacted by General Chapter <11> Reference Standards and General Notices 5.80 Revisions Official November 1, 2020

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.

USP has adjusted the pricing on a certain portion of our catalog effective November 1, 2020.

Download entire catalog as: EXCEL | PDF

Download the full foods list as: EXCEL | PDF

Download the full dietary supplements list as: EXCEL |  PDF

Download the full excipients list as: EXCEL |  PDF 

Download the full pharmaceutical analytical impurities list as: EXCEL | PDF

Value beyond the vial

The development process

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