LAB SAFETY. When to wear goggles and aprons? If using chemicals and flames

LAB SAFETY

When to wear goggles and aprons?

• If using chemicals and flames

Personal Safety: Goggles

• NO!!!!!!!

• YES!!!!!!!!!

• What is unsafe?

THINK!

• Accidents in the lab can be prevented!

• You are the most likely cause of an accident!

When you first enter the lab…

• A. Go to lab and start experiments• B. try out your own experiments while you

wait• C. read the lab and wait for the teacher’s

instructions• D. go pick up chemicals and practice the

lab• ANSWER: C

Read Lab First

• Read the experimental procedure ahead of lab.

Disposing of Matches

• The match should be quenched with water, NOT thrown into the waste crock directly.

• Fires may occur.

No Horseplay

If the fire alarm rang, what should you be sure is turned

off?• Bunsen burner• Electrical equipment• Gas valves• Close chemical containers

What should I wear in the lab…

• if I am going to work with chemicals and flames?

• Goggles

Closed Toed Shoes• The Safety Code of most schools will

not approve of open foot ware; so avoid sandals or flip-flops

NO FLOPPIES

• Avoid floppy garments; avoid things that dangle

• Avoid long, loose hair styles for the same reason.

• When Bunsen burners are in use, long hair sometimes catches on fire

Handling of Acids or Bases

• "Vinyl" gloves or "nitrile" gloves (often green or blue in color) are preferred.

Where’s the Safety Equipment?

–Fire Extinguishers –Fire Blanket –Eye-wash Fountain –First-Aid Kit

Fire Extinguishers

• the carbon dioxide extinguisher is red

• general purpose extinguishers.

• AVOID using a dry-chemical extinguisher on a fellow human being.

Fire Extinguisher

• Pull Pin• Aim

Fire Extinguisher

• Squeeze the handle to begin operation.

Fire Blanket

• Wrap it around the victim to smother the fire.

EYEWASH

EYE WASH

• If you get something from the lab in your eye—

• GET IT OUT IMMEDIATELY! • Run some water through the eyewash

fountain before you use it. • Retract your eyelid (hold it open); • Don’t squint—this restricts water access. • Run fresh water over your eye for several

minutes. • Go to the school nurse immediately

afterward.

First Aid Kit  • These items may be

used temporarily for small injuries (say, a cut finger) Go to the school nurse immediately afterward.

• Do not wait until the end of the day.

First Aid Kit

• However, if blood is in evidence-- STAY AWAY! Let the victim apply his/her own bandage.

• If blood is on the floor or lab bench, let trained personnel do the clean-up.

FUME HOOD

• Use the HOOD for reactions that give off vapors, especially smelly vapors.

• The draft of the HOOD will sweep away vapors so that the lab itself maintains reasonable air quality

Safety Shower

• Shower should be used for dire EMERGENCY only!

• If you (or a lab mate) is spilled chemicals, position yourself (or your lab mate) under the safety shower.

Safety Shower

• Pull the handle—a deluge of water will result.

• Lab Safety Video (7:27)

Safety Shower

• The safety shower should also be used if you suffer a massive spill of a dangerous chemical on yourself, and need to get it off rapidly.

Broken Glass

• Sweep it up right away • Don’t track in it all period.

Broken Glass

• Place the broken glass in a crock.

If you need to leave the lab table to go to the bathroom,

• A. Be sure someone is watching your lab station

• B. shut off the gas valve and electrical equipment

Is it OK to…

• A. eat in the lab• B. put your head in the fume hood • C. chew gum in the lab• D. drink in the lab• E. have horseplay in the lab

• ANSWER: NO

What is the first aid step to do if you…

• Cut your finger

• Your clothing caught on fire

• You burned your finger

• Mercury ran out of a thermometer

• Don’t touch it

• Stop, drop, and roll

• Run it under cold water

• Clean the wound, then use a Band-aid©

All living organisms should be handled with…

• RESPECT

• That means do not throw things into their homes.

• Do not tap on the aquaria. • Do not throw them on other students.

What should you bring back with you to the lab?

• A. Book Bag• B. Something to write with• C. Lab sheet• D. Biology Book• E. Lunch

• ANSWER: B and C

NO!!!!!!!!!!!!!

• No UNAUTHORIZED experiments! • These are terrible dangers in unskilled

hands.

NO!!!!!!!!!!!!!!!

No EATING or DRINKING in the LAB.

A good practice is to assume everything in the lab is toxic.

•  

No!!!!!!!!!!!!!!!!!

• DO NOT drink from lab equipment. • NOT EVEN distilled water.

Pipets NO

• When using pipets, DO NOT suck the liquid into the pipet directly by mouth.

Pipets YES

–DO use a rubber bulb to create a vacuum.

•  

When to use the beaker tongs?

Should you use glassware that is…

• Chipped• Dirty• Cracked

• ANSWER? NO

Testing of Odors

–Do NOT smell the flask directly.

•  

Wafting YES

If you absolutely must test the odor, carefully waft the vapor from the flask toward your nose with your hand.

Keep the flask quite distant from your face.

HOT GLASSWARE

• Remember NOT to hand the red-hot glass to another person, especially the teacher.

Heating Test Tubes

Make sure that reaction tubes, e.g. test tubes, are not directed toward yourself or other persons.

The chemicals may splatter out the tube.

•  

Heating Test Tubes

• Aim away from you and all people!

Water to Acids NO

• DO NOT add WATER to CONCENTRATED ACID.

• The heat generated may cause splattering.

Water to Acids YES

• DO add ACID to WATER instead of the reverse order of addition.

• The heat generated will be less, but splattering still may occur.

Practice Quizzes

• Lab Safety Practice Test• Chemistry (and Biology) Safety Quiz• Lab Safety Quiz• Safety Quiz• Short Answer Lab Safety Quiz