CHEMISTRY SAFETY NOTES

Prior to conducting any scientific investigation, it is important to consider your safety and the safety of those around you.All labs require SDS information for the chemicals used (you will look this up online). Most labs require additional safety considerations or comments (e.g.: goggles required, beware of hot glassware).

Today, we will go over the following safety topics-Fire safety-Chemical safety (spills and disposal)-Gas safety-Proper equipment use-Appropriate conduct

• Never leave a bunsen burner (open flame) or hot plate unattended.

• Eliminate clutter in lab area• Always follow directions

when handling chemicals• Contain flammable liquids

and gases. Keep them away from flames and heat.

Fire Safety

What to do if there is a laboratory fire.Notify your instructor immediately! Depending on the type of fire, and size of the fire,

he or she will decide to evacuate you or extinguish the fire.

Fire Safety

Locate the two exits. Draw them into your map!

• Stop, Drop and Roll! • Fire blankets • Quick release cabinets • For smothering fire (removing oxygen

from triangle).• Fire Extinguisher• Emergency power shut off• Gas Outlets– One main shut off in front of the

room.

To extinguish a fire…To extinguish a fire…

Fire Safety

To use a fire extinguisher, simply remember the acronym PASS

How to use an extinguisherHow to use an extinguisher

Fire Safety

FIND THE FIRE EXTINGUISHER.ADD IT TO YOUR MAP!

• Can you tell if this is too hot to touch? It will stay hot a lot longer than you might think!

• Hot Plates– Don’t touch until

completely cooled off…common burns!

While we’re talking hot…While we’re talking hot…

Fire Safety

SDS stands for Safety Data Sheet – you will need to look up the safety information for all chemicals before we use them in lab.The SDS uses pictograms to explain what type of danger each chemical poses.Those pictograms are…

Health, Flammability, and ReactivityRatings range from 0-4 (it is very rare to see a 4)0 4

A rating of 0 means it poses a very low threat in that category. A rating of 4 means it poses a VERY high threat in that category. It is rare in this course to see a rating of 3, but it does happen.

Try these outIf you saw a chemical with the following ratings, what would you think?

What would you do to make sure you were safe using this chemical?

Health Flammability Reactivity

0 1 0

Try these outIf you saw a chemical with the following ratings, what would you think?

What would you do to make sure you were safe using this chemical?

Health Flammability Reactivity

1 0 0

• Acid is poured into water because…– Risk of splashing– Acid + water is often exothermic

(gives off heat), so adding the reactive piece second is safest (less likely to be explosive.

• GOGGLES! – Worn at all times when using

hazardous chemicals and during hazardous activities!

– Sanitized between classes.

• Eye wash – Must be able to reach within 10 seconds– If chemical gets into your eyes…JUST GO!– Capable of washing both eyes at the same time– Must be flushed 2-3 minutes/week to protect again

contamination/infection• Must NEVER be used as a drinking fountain.

– Flushed continuously for AT LEAST 15 minutes.• Lift eyelids away from surface of eyeball.

FIND THE EYE WASH.ADD IT TO YOUR MAP!

• For Fire and Chemical Spills• Delivers 20 gallons of water/minute• Contaminated clothes must be removed

immediately– Class leaves, teacher stays, looking

away.– Or Fire Blanket could be used for

modesty• Lab coats/aprons are made to be taken

off…– In case of chemical spill (or fire) that

is what should be done first.

FIND THE SAFETY SHOWER.ADD IT TO YOUR MAP!

• Contacts pose a greater risk of eye injury when working with chemicals.• Chemicals can get trapped between your

contact and your eye – at best this may increase the irritation, at worst it may melt the contact to your eye.• It is recommended (but not required)

that you wear glasses and not contacts during a chemistry lab.

Outlets are off if the valves are perpendicular (at a right angle) to the nozzle.

OFFOFF

ON

* Gas and Air Master OFF switch is next to whiteboard up front WHERE IS THE MASTER GAS SHUT

OFF?ADD IT TO YOUR MAP!

- Handle all lab equipment with care and caution.

- Remember, glassware is fragile and very hot to the touch after having been heated

- Should glassware break, sweep up with a broom and dispose of in broken glass box

All lab equipment and materials should be accounted for at the end of a lab, thoroughly CLEANED, and returned to respective drawer, cabinet, or cart.

First Aid Kit

•Found in a Red Backpack under the teacher demo station.

Until the end of class…

Answer the safety questions, in your composition book, in complete sentences.

IF THIS IS NOT COMPLETED IN CLASS, YOU MUST FINISH IT AS HOMEWORK

CONTRACT, POWER POINT, AND QUESTIONS ARE ONLINE.

Safety video

https://www.youtube.com/watch?v=VRWRmIEHr3A