Chem 1LC Safety Practical

perform only supervised and authorized experiments in lab. An [K] must be present at all times and all procedures must be followed.

instructor

use tongs or protective gloves to handle [L] objects.

hot

add concentrated [M] slowly to water while stirring when diluting - NEVER the reverse!

acid

use [N] procedures and precautions when inserting glass tubing into a rubber stopper.

correct

properly label all chemical containers and [O] labels before using chemicals.

read

store all book bags, purses, coats, etc., in [P] areas to avoid clutter.

designated

[Q] my workspace and wash hands frequently during lab and thoroughly before leaving lab.

clean

I will wear safety [A], not safety glasses, and lab aprons at all times.

goggles

wear clothing providing [B] protection. Shorts, Capri pants, sandals, slip on shoes, minis, and bare stomach, shoulders, or backs are not allowed in the labs.

maximum

conduct myself in a mature fashion. Excessive noise or [C] behaviors are NOT permitted.

disruptive

note the exact location of all [D] and learn its proper use.

safety equipment

perform reactions using (or evolving) noxious or highly combustible chemicals in a [E].

fume hood

report and [F] all spills immediately.

clean up

[G] from eating, drinking, smoking, or chewing gum in lab.

refrain

[H] of any cracked or broken glassware.

dispose

extinguish all flames or ignition sources when using [I] and/or volatile chemicals.

flammable

place all left-over chemicals in the appropriate collection bottles in the hood. Do NOT dump chemicals into the [J].

sink or trash

think before acting and use [R] judgement and care in the lab.

good

[S] report all injuries to the instructor no matter how small the injury appears.

immediately

When working with a heat source

Always assume glassware and metal objects are hot

when working with volatile chemical

work in the fumehood

working with a bottle containing a chemical

never assume the cap is tighten, grasp it firmly, hold the bottle with the label in the palm of your hand.

What should be worn at all times in the laboratory?

Goggles, Closed toe water shedding shoes, Long pants, Lab Coat

What should be done in case of a fire?

notify the lab instructor, evaluate the situation, move away from the fire

What if the fire alarm sounds?

Stop chemical reactions, lower hood sashes, evacuate building by taking the stairs, unplug electrical equipment

What if an accident occurs

Notify lab instructor, seek medical attention, act quickly, don't panic

What should NOT be allowed in lab?

Drink,Food,Mixing chemicals without specific instruction from lab instructor, open flame, students not enrolled in lab section

When should gloved be worn?

Handling toxic or corrosive chemicals

What should a student location when entering lab?

Eye wash stations, Emergency exits, Safety showers, Stairwells, Fire Extinguisher

What is the most appropriate action if chemical has just splashed on a person's face in lab?

Wash face without removing goggles if eyes are not yet affected

2 multiple choice options

If large portion of a person's body are exposed to harmful chemicals, what should be done?

Remove clothing and use safety showers

What is the minimum amount of time an area of a person's body that has been exposed to harmful chemicals should be washed?

15 minutes

3 multiple choice options

Safety

Freedom from danger, injury, or damage

Hazard

potential source of danger or harm

Risk

probability of suffering harm because of exposure

Exposure

Coming in contact with a hazard

What eye protection is best against chemical splash?

Chemical splash safety goggles

Destroys Living Tissue on contact

Corrosive

3 multiple choice options

Easily ignites and burns rapidly

Flammable

3 multiple choice options

Irritates living tissue on contact

irritant

3 multiple choice options

Rapidly oxidizes, can result in combustion

oxidizer

May be fatal to humans & animals

poison

1 multiple choice option

causes severe immune reaction after repeated exposures

sensitizer

1 multiple choice option

causes adverse health effects

toxic

1 multiple choice option

What is the GHS symbol with a skull face?

Fatal

What is GHS symbol of fish in the water?

Aquatic Toxicity

What is GHS symbol of circle on fire?

Oxidizer

What is GHS symbol with a human shape?

Carcinogen & Toxic

What is the GHS symbol with a flame?

Flammable

What is the GHS symbol for exclamation mark.

Irritant, skin sensitizer

What is GHS symbol of a circle exploding?

Explosive

What is the GHS symbol for a bottle?

Gas Under Pressure

What is GHS symbol of the liquid being poured on a slab and hand?

Corrosive

NFPA 704

A color-coded system used to identify the hazards associated with materials, primarily in emergency situations.

Health Hazard (Blue Section)

Indicates the degree of health risk posed by exposure to a material, rated from 0 (no hazard) to 4 (deadly hazard).

Flammability Hazard (Red Section)

Represents the material's susceptibility to catch fire, rated from 0 (will not burn) to 4 (extremely flammable).

Reactivity Hazard (Yellow Section)

Describes the stability of a material under normal conditions, rated from 0 (stable) to 4 (may detonate).

Specific Hazard (White Section)

Provides additional information on specific hazards such as radiation or acid, often indicated by symbols.

GHS Hazard Categories

Category 1: Most severe hazard; greatest danger.

Category 2: High/Moderate hazard.

Category 3: Moderate hazard.

Category 4 / 5: Lowest hazard within the classified system

Signal Words

Warning(less severe category 3&4), Danger (for most severe categories 1&2)

Safety Data Sheet

SDSs include safety information about products compiled by the manufacturer, including hazardous ingredients, safe use and handling procedures to reduce the risk of accidental harm or overexposure, and more. May not be accurate

What percentage of known chemicals have SDS?

0.1%

Who creates SDS?

chemical suppliers

2 multiple choice options

What GHS components are incorporated in SDS?

Pictograms, Signal Words,Hazard Statements

Are SDS legally required to be accurate?

No, so you should also cross examine from different manufacturers

SDS is written for a (professional or industrial) setting, because of this, chemical hazards and personal protective equipment requirements may be (under or overstated).

industrial, overstated

Compare label, determine hazard class, look for procedures

Rearrange these steps for using SDS:

-Look at the procedures for safe handling

-compare label info to ensure you have right SDS

-determine hazard class

What is true about NaOCl?

1. Bleach can cause severe skin burns and eye damage.

2. Bleach is a weak reducing agent.

3. If a significant amount of bleach is spilled on you, get into the safety shower.

4. Bleach forms poisonous chlorine & chloramine gas when combined with ammonia

5. Nitrile gloves have a 480 min breakthrough time for bleach.

1,3,4,5

Fire Tetrahedron

Model of the four elements/conditions required to have a fire. The four sides of the tetrahedron represent fuel, heat, oxygen, and chemical chain reaction.

How to remove Heat?

1. Use a halon fire extinguisher

2. Carbon dioxide fire extinguishers blanket substance to put out the fire

3. Pour water on the fire

4. Keep amounts of flammable solvents at a minimum in lab

3. Pour Water on the fire

How to remove oxygen fire?

1. Use a halon fire extinguisher

2. Carbon dioxide fire extinguishers blanket substance to put out the fire

3. Pour water on the fire

4. Keep amounts of flammable solvents at a minimum in lab

2. Carbon Dioxide fire extinguishers blanket substance to put out the fire

How to remove chemical chain reaction fire?

1. Use a halon fire extinguisher

2. Carbon dioxide fire extinguishers blanket substance to put out the fire

3. Pour water on the fire

4. Keep amounts of flammable solvents at a minimum in lab

1. Use a halon fire extinguisher

How to remove a fuel fire?

1. Use a halon fire extinguisher

2. Carbon dioxide fire extinguishers blanket substance to put out the fire

3. Pour water on the fire

4. Keep amounts of flammable solvents at a minimum in lab

4. Keep amounts of flammable solvents at a minimum in lab

what is the PASS acronym?

P-pull safety pin

A-aim at the base of fire

S-squeeze handle

S-spray in sweeping motion

Which of the following actions should you take if you or your labmate are on fire?

Stop,drop, roll, and wrap the person in a fire blanket

Class A Fires

Paper,clothing,plastic

Which are the following statements are true about fire?

1. Water can be used to extinguish a class B fire.

2. Water cannot be used to extinguish a class D fire.

3. Fires are classified by what type of oxidizing agents are involved.

4. The fuel must be vaporized to burn.

5. Removing heat keeps the fuel from vaporizing

2,4,5

Class B Fires

Gasoline, oil, organic solvents

Class C Fires

Hot plates, computers, electrical components

Class D Fires

Reactive Metals (sodium, lithium)

Choose appropriate actions to take in the event of a spill.

1. If splashed with a large quantity of liquid, wipe off contaminated clothing.

2. Eyewashes should be used for at least 15 minutes.

3. Use a spill pillow to absorb liquids with nontoxic vapors.

4. Use a small brush & dustpan when cleaning up a solid.

5. Contaminated clothing must be removed & treated as hazardous waste.

6. If splashed with a large quantity of a chemical, use the shower immediately.

7. Spilled solid should be returned to its original bottle.

8. If solid is spilled on skin wash scrape off, then wash with water.

9. Nonvolatile liquid spills require lab evacuation.

2,3,4,5,6,8

What the key steps for responding a spill?

Communication, Isolate, Mitigate, Evacuate

Notify an instructor or stockroom staff of the spill location & contents

Communicate

If possible contain the spill with a spill pillow,sand,etc

Isolate

If spill is large and/or hazardous, leave the room or building

Evacuate

Spill clean up, Your instructor will determine if you are able to assist

Mitigate

Which of the following should be done when handling a corrosive?

1. wear goggles, lab coat & gloves

2. wear long sleeved shirts, long pants, and closed toe shoes

3. carry bottles in secondary containers

4. know the location of eyewash stations & safety showers

5. use chemicals in the fume hood if the they're an inhalant hazard

6. if exposed to skin, wash off immediately

7. use concentrated solutions whenever possible

8. discard gloves after contamination or taking off

1,2,3,4,5,6,8

What does RAMP protocol stand for?

Recognize the hazard of acid to the eyes

Assess procedure, their knowledge,& exposure probability

Minimize risk of exposure by wearing goggles

Prepare for emergencies by locating eye wash

What types of airborne particles are there?

Mists, Fumes, Dusts, Smoke,Nanoparticles

Mists

Tiny droplets of liquid suspended in air

Fumes

Colloidal suspension of solid or liquid particles in air

Dusts

Solid particles suspended in air

Smoke

Mixture of dry particles and droplets of liquid

Nanoparticles

Ultrafine homogenous particles ranging in size from 1 to 100 nm

How to minimize ingestion exposure?

Do not put anything in your mouth that has been in lab

How to prevent eye exposure?

Always wear goggles

How to prevent inhalation exposure?

Cap flasks containing volatile liquids

How to prevent skin exposure?

Clean surfaces, wear gloves & lab coat

How to prevent injection exposure?

Use a dustpan and broom to clean up broken glass

Which of the following playing significant roles in the extent of injusry or harm when exposed to a hazardous chemical ?

1. The amount of time one is exposed to the chemical

2. How the chemical entered the body

3. The atmospheric pressure

4. The relative humidity

5. The amount of chemical one is exposed to

6. The availability of safety equipment

1,2,5