The GLP regulations in FDA and EPA Subpart E require the same method to indicate identity, titer or concentration, storage requirements, and expiration date on containers of reagents and solutions. What is that method?

• A. Using a label to provide this information
• B. Engraving the information directly on the container
• C. Providing a separate data sheet with each shipment
• D. Emailing the information to the receiving lab

Answer: (A)

In GLP, keeping key information with the reagent at all times is essential. The container should carry a label that clearly shows its identity, the titer or concentration, how it must be stored, and its expiration date. This single-label approach travels with the item through handling and storage, ensuring anyone who uses or audits the material can quickly verify what it is, how potent it is, how to store it, and when it’s no longer usable. Engraving the information directly on the container isn’t always practical for all materials and may not be easily updated; using a separate data sheet or emailing details doesn’t guarantee the information is readily accessible at the point of use or during handling. Therefore, labeling the container itself with all four items is the correct method.