Podcast
Questions and Answers
Is mouth pipetting still practiced in laboratories nowadays?
Is mouth pipetting still practiced in laboratories nowadays?
False
When dealing with acids and water, which should you put in first?
When dealing with acids and water, which should you put in first?
What should hazardous chemicals be labeled with?
What should hazardous chemicals be labeled with?
Description of their particular hazard
What does the NFPA label system indicate?
What does the NFPA label system indicate?
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An important chemical safety rule to remember when dealing with acids and other liquids is never add ______ to an acid.
An important chemical safety rule to remember when dealing with acids and other liquids is never add ______ to an acid.
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Which of the following is NOT a physical hazard according to OSHA's classification?
Which of the following is NOT a physical hazard according to OSHA's classification?
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What is a requirement for chemical storage?
What is a requirement for chemical storage?
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Which of the following is an example of a health hazard?
Which of the following is an example of a health hazard?
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Study Notes
Chemical Safety Procedures
- Chemical safety is crucial in a laboratory setting, especially when dealing with cleaning reagents, preservatives, or specimens.
- Improper chemical handling can lead to dangerous consequences.
- The Occupational Safety and Health Administration (OSHA) classifies chemical hazards into two groups: physical hazards and health hazards.
- Physical Hazards: include compressed gases, explosives, flammable liquids and solids, organic peroxides, oxidizers, pyrophoric substances, reactive/unstable chemicals, and water-reactive chemicals.
- Health Hazards: include toxic agents, reproductive toxins, carcinogens, irritants, tissue corrosives, sensitizers, and agents that act on or damage other body systems.
General Rules for Chemical Safety
- Always wear appropriate protective clothing, including a lab coat, apron, gloves, and safety goggles, when working with chemicals.
- Never indiscriminately mix chemicals together.
- Never store chemicals in unlabeled containers.
- Never pour chemicals into dirty containers, especially containers previously used to store other chemicals.
- Never store chemicals above eye level.
- Never use chemicals in ways other than their intended use.
- Chemicals should never be mixed together unless specific instructions are followed, and they must be added in the order specified.
- Wearing goggles and preparing reagents under a fume hood are recommended safety precautions.
- Chemicals should be used from containers that are easily manageable size.
- Pipetting by mouth is unacceptable in the laboratory.
- Always add acid to water or other liquids. Never add water or other liquids to an acid, as it can cause an explosive reaction.
- State and federal regulations are in place for the disposal of chemicals and should be consulted.
Chemical Labeling
- Hazardous chemicals should be labeled with a description of their particular hazard, such as poisonous, corrosive, flammable, explosive, teratogenic, or carcinogenic.
- The National Fire Protection Association (NFPA) developed the **Standard System for Identification of the Fire Hazard of Materials (NFPA 704) **
- The NFPA 704 uses a diamond-shaped, color-coded symbol containing information on health, flammability, reactivity, and personal protection/special precautions.
- Each category is graded on a scale of 0–4, based on the extent of concern.
- These symbols are placed on doors, cabinets, and containers.
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Description
Test your knowledge on essential chemical safety procedures in a laboratory setting. This quiz covers important information about handling reagents, understanding hazards, and following safety rules. Evaluate your awareness of Occupational Safety and Health Administration (OSHA) classifications and proper protective measures.
