After finishing work with a reagent bottle in the laboratory, what is the appropriate action to take?

• A. Dispose of any remaining reagent in the sink.
• B. Mix the reagent with other chemicals before storing.
• C. Leave the bottle open on the lab bench for easy access.
• D. Close the bottle tightly and return it to its designated storage location.

Answer: (D)

Verified step by step guidance

1. Understand the importance of proper reagent bottle handling to maintain safety and chemical integrity in the laboratory.
2. Recognize that disposing of reagents down the sink can cause environmental harm and may violate safety protocols.
3. Avoid mixing leftover reagents with other chemicals, as this can lead to dangerous reactions or contamination.
4. Never leave reagent bottles open on the lab bench, as exposure to air or moisture can degrade the chemical and pose safety risks.
5. The correct procedure is to securely close the reagent bottle to prevent spills, contamination, or evaporation, and then return it to its designated storage location to ensure safe and organized lab conditions.