Chemistry 1.02 Ahmed - Lab Safety

Accidents do not just happen, they…

are caused

Three things that lead to accidents

carelessness, haste, and disregard for rules and practices

safety practices protect…

you and everyone around you

Year OSHA was passed

1971

OSHA

Occupational Safety and Health Act

Purpose of OSHA

reduce workplace accidents (including in labs)

kinds of hazards in a lab

biological, physical, radioactive

Safety regulations are a matter of…

local, state, and federal law

Before beginning a lab…

5. Never eat, drink, or chew gum during lab.

6. Remove unnecessary papers, etc. from the lab table.

7. Place purses, bags & backpacks out of the aisles.

Familiarize yourself with lab procedures

Always carefully review and abide by the…

oral/written instructions

You are never permitted to work…

alone in the lab/do unauthorized experiments

Before a lab, notify the teacher of

allergies, asthma, or other pertinent medical history

Why may you not eat/drink/chew gum

1. distracting

2. could fall into your experiment and taint results/cause a mess

How should the table be in the beginning of an experiment

cleared (no papers, etc.)

Bag placement

out of aisles

Required safety gear

lab coats and goggles

How to deal with:

hair

footwear

tops

jewelry

eyewear

long hair must be tied back

footwear should be close-toed

tops should have tight fitting sleeves

jewelry/lanyards must not dangle

NO contacts, glasses should be covered by goggles

Take the lab…

seriously

Process of testing odors

direct the fumes using a wafting motion to your nose

Experiments with poisonous vapors to be conducted in…

the fume hood

Fume hood function

It blows all the air out the fume hood

What to do after a lab?

Clean the table and leave it clear as per teacher instructions

Which specific lab areas should be cleaned

lab table, electronic balance, chemical bottles

What do you do with lab aprons/coats and goggles

return to OG location

After finishing handling chemicals, you should…

wash your hands with soap and water!

To ensure you’re familiar with how to handle a chemical properly what should you check?

Chemical labels and NFPA diamonds

How much chemical should you retrieve in an experiment

only as much as you need

What to do with leftover chemicals?

do not return to stock

What to do if you touch chemicals with your bare hands?

wash them immediately

AAA rule

Always Add Acid to Water

Carry glassware…

away from your body

How to prepare glass for holed glass stopper

lubricate it

How to handle hot glassware?

Tongs (ie, beaker tongs for beakers)

HOT GLASS LOOKS LIKE… Allow…

cool glass. time to cool down

Broken glass

notify teacher! sweep up with dustpan and brush (use gloves) and dispose of in broken glass box

Electrical cords: 3 things

32. Heat a substance only when necessary, and for a short period of time.

33. Ignite a Bunsen burner only when necessary.

34. Pay attention to lit Bunsen burner flames.

35. Keep your body, clothing, chemicals, and combustible materials away from lit Bunsen

burner flames.

out of the way, untangled, on the table

When heating a test tube,

point mouth away from others

When containers are being heated,

keep face clear

How long should you heat substances? When?

For short periods of time, only when necessary

When should you light a Bunsen burner?

only when necessary

Avoid what around lit Bunsen burners

bringing clothing, body parts, or combustible materials to flame

Steps after a chemical spill occurs

1. remain calm

2. notify teacher

3. consult the SDS

4. Clean and bandage cuts (if any)

Steps if chemical gets in the eyes

1. Have a friend lead you to the eyewash

2. Run it for a minute to clear debris

3. Hold eye open with thumb and forefinger

4. Rinse eye from the outside to inside corners for 15 mins

5. Roll eyes around for full coverage

6. Contact medical professionals

What kind of fire extinguisher is used?

Class ABC

____, _____ fires involving ____,____ , ____= fire extinguisher

open, contained; combustibles, oil, electricity

Pressure gauge

Arrow should clearly rest in green

Steps to operating fire extinguisher

1. break seal/pull the pin

2. Walk 10 ft away

3. Aim the hose at the base of the fire

4. Squeeze the handle to release agent

5. Sweep the nozzle across the span of the fire

6. After 10 seconds, evacuate

7. Contact medical professionals

What extinguishes burning things

Fire extinguisher

What extinguishes burning people

fire blanket

Steps for fire blanket usage

1. Turn off (if possible)/move away from flame

2. Unfold blanket

3. Shield yourself or other person and approach

4. Wrap tightly to smother fire

5. Seek medical attention ASAP

If no fire blanket is readily available,

stop, drop, and roll

When to use safety shower

After chemical spill onto skin

Steps for the safety shower

1. go to safety shower

2. Remove contaminated clothing

3. Rinse for 15 minutes

4. contact medical professionals

What are some things SDSs address

Chemical properties, what to do in case of spill, first aid measures, how to handle, protective equipment required

Immediate-use chemical label

Your name, the date, chemical name, and chemical formula

Extended-use chemical label

Chemical name, formula, and hazard information

NFPA red

flammability

NFPA blue

health

NFPA yellow

chemical reactivity

NFPA white

special hazards

RED	Ranking
4
3
2
1
0

RED	Ranking
4	burns at 73° F
3	burns at 100° F
2	burns at 100-200° F
1	burns at 200° F
0	will not burn

BLUE
4
3
2
1

BLUE	Ranking
4	deadly
3	Extreme danger
2	Hazardous
1	Slightly hazardous

YELLOW	Ranking
4	May detonate
3	Shock and heat may detonate
2	Violent chemical change
1	Unstable if heated
0	Stable

YELLOW	Ranking
4
3
2
1
0

WHITE	Meaning
OX	Oxidizer
ACID	Acid- corrosive
ALK	Alkaline/base- corrosive
COR	Corrosive
w̶	Water-reactive
☢	Radioactive

WHITE	Meaning
OX
ACID
ALK
COR
w̶
☢

Acute toxicity

oxidizer

irritant

explosive

corrosive

compressed air

environmentally toxic

flammable

health hazard