Should You Return Reagents?

Never return unused chemicals to the reagent bottles.
This is a source of possible contamination of the entire contents of the stock bottle. Dispose of unused chemicals exactly as instructed in the waste disposal instructions for that substance, identified by throughout each experiment.

What should you do with unused reagents?

What should you do with leftover chemicals after an experiment?
  1. Return any chemicals (excess reagent, product, or waste) to the appropriate location, or dispose of them as instructed;
  2. Clean any used glassware and return the items to the appropriate location; and.
  3. Wipe down the work surfaces.

Why unused reagents should not be returned to their original container?

Do not return chemicals to the original containers – To avoid contamination of chemicals, dispose of used chemicals according to your instructor's instructions. NEVER return unused chemical to reagent bottles. Some liquids and water-soluble compounds may be washed down the sink with plenty of water, if told to do so.

Marcus Vance

Marcus Vance

Cybersecurity & Digital Privacy Researcher

Marcus Vance is a cybersecurity auditor and technology writer dedicated to educating the public about online safety, data privacy regulations, enterprise security, and emerging cyber threats.