Which labeling feature is essential for test articles in GLP to prevent mix-ups?

• A. Only the article name.
• B. Clear labeling that identifies the article, batch/lot, and storage conditions.
• C. No labeling is required if the article is identical to others.
• D. Labeling that matches the supplier's generic label.

Answer: (B)

In GLP, keeping test articles clearly identified is essential to prevent mix-ups and preserve study integrity. The key labeling should convey exactly what the item is, which batch or lot it came from, and how it must be stored. This combination creates a reliable trail that lets you distinguish between similar items, track materials through every step of the study, and verify that each sample is handled under appropriate conditions.

If you label only with the article name, you risk confusing items that look alike or come from different production runs, which can lead to mixing samples and invalid results. Omitting batch or lot information makes it impossible to determine which results came from which production batch, hindering traceability and quality control. Relying solely on a supplier’s generic label can ignore internal handling requirements, storage instructions, or internal tracking needs that are critical for GLP compliance. By ensuring a clear label includes the article identity, batch/lot, and storage conditions, you create a robust system for accurate identification, proper handling, and traceability throughout the testing process.