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A lab reagent is a substance or compound added to a system to cause a chemical reaction or to test if a reaction occurs. Reagents are essential in research, diagnostics, and quality control processes.

Shelf life varies by reagent. It is typically indicated on the label or the accompanying certificate of analysis. Do not use reagents beyond their expiration date unless stability data supports extended use.

It is not recommended unless validated by internal QC testing or extended stability data. Using expired reagents can lead to inaccurate results.

Follow your institution’s chemical waste disposal guidelines. Some reagents require special handling due to toxicity, flammability, or environmental hazards.