Which statement best explains the labeling on reagent containers under GLP?

• A. It should indicate identity, titer or concentration, storage requirements, and expiration date
• B. It should only show the supplier name and batch number
• C. It should include the color of the container and the room number used
• D. It is optional and may be omitted if the item is for internal use only

Answer: (A)

In GLP, labeling every reagent container with essential, actionable details is essential for accurate use, safety, and data integrity. The label should clearly show what the item is (identity), how potent or concentrated it is (titer or concentration), how it must be stored to stay stable (storage requirements), and when it should no longer be used (expiration date). Together, these elements prevent mix-ups, ensure reagents are used within their valid period, and keep the study reproducible by providing the information needed to prepare, store, and verify reagents correctly.

Other options fall short because they omit or misrepresent critical information. Merely listing supplier name and batch number doesn’t tell you what the item actually is, its current potency, or its usable period. Including only the color of the container or the room number isn’t relevant to stability or proper use. And labeling is not optional in GLP—it’s required to maintain quality, traceability, and compliance.