Laboratory Chemical Safety Lecture

These flashcards cover essential safety practices and classifications in a chemical laboratory, focusing on personal protective equipment, hazard identification, and emergency procedures.

What is the purpose of personal protective equipment (PPE) in a laboratory?

It is required for you to wear for safety when you work in the laboratory.

What type of eye protection is acceptable to wear in the lab?

Contact lenses are okay if goggles are worn over them.

What should you do if your gloves have small holes or tears?

Inspect each glove and change it immediately if damaged.

Where are eyewash stations commonly located in a laboratory?

Know where they are in your lab for emergencies.

What emergency equipment must be tested weekly?

Eyewash and safety shower must be tested weekly.

When should experiments with flammable reagents be conducted?

In a chemical fume hood.

What does it indicate if the fume hood alarm goes off?

The hood is not protecting you and adjustments are needed.

When using a fume hood, how far should equipment be from the sash?

Set back at least 6 inches.

What should you never do while working in a fume hood?

Never lean in and/or put your head in the hood.

What is the correct procedure for mixing concentrated acids?

Always add concentrated acids drop by drop to flasks of water.

What are the main routes of body exposure to chemicals?

Inhalation, ingestion, absorption, injection.

What is a carcinogen?

A substance that can cause cancer.

What examples of corrosives should you be aware of?

Hydrochloric acid and sulfuric acid.

What should you do if corrosives are splashed in your eyes?

Wash the affected area with water for 15 minutes and seek medical attention.

What defines a flammable liquid?

A liquid with a flash point below 37.8°C (100°F).

What type of storage is required for flammable liquids?

They must be stored in a flammable storage cabinet.

What are oxidizers?

Chemicals that support combustion.

What should be done with peroxide-forming chemicals after opening?

They should be dated and disposed of within 6 months of opening.

How should cryogens be handled?

Wear gloves designed for working with cryogens and a face shield.

What is the risk associated with reactive chemicals?

They can spontaneously explode, ignite, or evolve dangerous gases.

What are incompatible chemicals?

Chemicals that react dangerously when they come in contact with others.

What are the three main areas of standardization in laboratory safety?

Classification of hazards, labeling requirements, safety data sheets.

What does the NFPA diamond signify?

It classifies the hazards of chemicals in terms of health, fire, and reactivity.

What is the meaning of a health hazard rating of 4 in NFPA?

Deadly.

What is required on a chemical product label under GHS regulations?

Product Identifier, Signal Word, Pictogram, Hazard Statement, and Supplier Information.

What information does the phrase 'exclamation mark' denote in GHS labeling?

It indicates irritants and acute toxicity.

What type of damage can corrosive materials cause?

Skin corrosion/burns and eye damage.

What are the consequences of improper handling of gas cylinders?

A broken valve can make it a dangerous projectile.

What are the procedures for chemical spills?

Notify instructor, assess the spill, contain it, and clean up.

What should be included in a Safety Data Sheet (SDS)?

Identification, hazard identification, handling measures, toxicological info.

What hazards do peroxide-forming chemicals present?

They can be an explosive hazard.

What is the flash point of flammable liquids?

The temperature at which sufficient vapor is given off to form an ignitable mixture with air.

What is the appropriate procedure if chemicals are splashed on the body?

Wash the area with water for 15 minutes and seek medical attention.

What type of gloves should be worn in the laboratory?

Chemically resistant lab gloves, like nitrile.

What actions should be taken if an emergency shower is used?

Area must be kept clear and it must be tested weekly.

What should you do before taking off your gloves?

Throw them away any time you take them off.

What kind of refrigerators should be used for flammable liquids?

Explosion-proof refrigerators.

What must be done if a chemical spill is large?

Get help from the emergency response team.

What does the flame pictogram indicate?

A chemical is flammable or pyrophoric.

What does the skull and crossbones pictogram indicate?

Acute toxicity or fatal toxicity.

What should be done with certain chemicals that are highly reactive?

They must be stored separately from incompatible substances.

What essential information is found in Section 1 of an SDS?

Identification of the chemical.