USP Reference Standards Listings & Catalog
Find Your Reference Standard
- Reference Standards Listings
This comprehensive list allows you to alphabetically search USP’s Reference Standard collection and purchase items directly from the USP online store.
- Daily Listings
This website-only resource, which is updated daily, lists all USP Reference Standards with current lots, previous lots with valid use dates, and prices.
- USP Catalog
The USP Catalog is published online every two months. An annual print version is also available. The USP Catalog lists USP Reference Standards with current lots, previous lots, valid use dates, purity values, CAS numbers, and prices. It also includes ordering information in multiple languages, information about USP publications and education courses, and details on how to use Reference Standards.
Use this helpful guide to interpret codes and information found in the listings.
Resources, Tools, Submit Feedback
Use the following tools to stay informed of USP Reference Standards currently under development, items that are newly released, and how you can suggest new items.
- Reference Standards Under Development
List of USP Reference Standards currently under development. Features anticipated release dates. Updated quarterly.
- Notification Service
The Reference Standards Notification Service can be used to notify you when a new, never-before-released Reference Standard becomes available.
- Submit Ideas for Reference Standards
USP welcomes your ideas for new Reference Standards not currently in our catalog.