Where can I find information on labeling and storage of USP Reference Standards?
USP’s policy is to include proper storage conditions for unopened Reference Standards on the container label. Storage conditions are lot specific. USP generally provides enough material for multiple preparations. Any unused portions remaining after the container has been opened should be carefully stored in accordance with prudent laboratory procedures. There are many variable outside of the control of USP. Therefore, USP makes no warranties concerning the continued suitability of previously opened Reference Standards. Decisions concerning the proper use of previously opened Reference Standards are the responsibility of the purchaser. (View USP’s policy statement on the storage and usage of Reference Standards. (61KB)) Labeling and storage information for USP Reference Standards is also provided in General Chapter <11> USP Reference Standards of USP 26–NF 21. If the specific label instructions differ from the instructions in USP–NF (this may happen if the labels are updated before a ne
