safety-in-academic-chemistry-laboratories-students

Dispose of old chemicals after a specified storage

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Unformatted text preview: e refrigerator, and the name of the person who stored the material. Dispose of old chemicals after a specified storage period. Store radioactive materials only in a designated refrigerator that can be locked and is properly labeled for such storage. Never under any circumstances store food or beverages in a refrigerator used for laboratory chemicals or radioactive materials. Disposal Properly handling reaction byproducts, surplus, waste chemicals, and contaminated materials is a major element of accident prevention. Every student is responsible for ensuring that these wastes are handled in a manner that minimizes personal hazard and recognizes the potential for environmental contamination. Typically, your reaction byproducts and surplus chemicals will be neutralized or deactivated as part of your procedure. Alternatively, your instructor will direct you to use designated, labeled waste containers; most likely, different containers are used for different classes of chemicals. Handle your waste materials in the specific ways designated by your instructor. 8 students short index 1/15/03 12:45 PM Page 9 General Disposal Guidelines ● When disposing of chemicals, put each class of waste chemical in its specifically labeled disposal container. ● Never put chemicals into a sink or down the drain unless your instructor has told you that these substances are allowed by local regulations to be put into the sanitary sewer system. For example, water and dilute aqueous solutions of sodium chloride, sugar, and soap from a chemistry laboratory may be disposed of in the sink. ● Put ordinary waste paper in a wastepaper basket separate from chemical wastes. If a piece of paper is contaminated, such as paper toweling used to clean up a spill, put the contaminated paper in the special container that is marked for this use. Such paper must be treated as a chemical waste. ● Broken glass belongs in its own marked waste container. Broken thermometers may contain mercury in the fragments; they belong in their own labeled container. Unattended Operation of Equipment Reactions that are left to run unattended overni...
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This document was uploaded on 02/27/2014 for the course PHYS 1B at UCSD.

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