SAFETY IN THE SAFETY IN THE

GENERAL GENERAL CHEMISTRY CHEMISTRY LABORATORYLABORATORY

Successful work in the chemistry laboratory involves not only mastery of chemical concepts and techniques, but also knowing:

Slide 1a-Introduction

• what the safety requirements are, • what equipment is available, and • when and how to use each piece of

equipment.

Safety regulations are established for each laboratory Safety regulations are established for each laboratory by Federal, State, and University mandates.by Federal, State, and University mandates.

Personal Safety Personal Safety RequirementsRequirements

Slide 2a-Personal Safety Requirements

It is It is mandatorymandatory that that NO FOOD or DRINKNO FOOD or DRINK items be taken into the laboratory.items be taken into the laboratory.

In addition to In addition to not eatingnot eating, , drinkingdrinking or or smokingsmoking in in the laboratory,the laboratory, each person working in a each person working in a chemistry laboratory needs to observe chemistry laboratory needs to observe

ALL RELEVANT SAFETY REGULATIONSALL RELEVANT SAFETY REGULATIONS.

Eye ProtectionEye Protection

Z87 Type Goggles

O

Slide 3a-Eye ProtectionWhenever anyone is working with chemicals or apparatus in the laboratory, safety goggles are safety goggles are required for ALL personsrequired for ALL persons in the laboratoryin the laboratory.

In the University of Michigan chemistry laboratories, these must be goggles, not glasses.

•They must have a “Z87” imprinted on themmust have a “Z87” imprinted on them to indicate they meet flammability and chemical resistance requirements.

•They cannot have any type cannot have any type of open perforationsof open perforations.

•In addition, contact lenses are not allowed in the contact lenses are not allowed in the laboratory, even while wearing goggleslaboratory, even while wearing goggles.

Slide 3a-Proper ClothingWearing correct Wearing correct attireattire is essential to help avoid is essential to help avoid laboratory accidents.laboratory accidents.

•Floppy sleeves should be avoided.

•Shoes that cover the entire foot are required.

•Shorts are not acceptable in the laboratory.

•Long hair should be tied back.

•Lab coats are required.

•All backpacks, book bags, and coats should be placed on the coat rack and shelves provided or stored in a drawer-NOT ON THE BENCHES.

GlovesGloves

Whenever handling Whenever handling corrosive or toxic corrosive or toxic materials, materials, protective gloves should be worn.protective gloves should be worn.

Slide 4a-Gloves

Whenever handling Whenever handling corrosive or toxic corrosive or toxic materialsmaterials, protective gloves should be worn, protective gloves should be worn..

Gloves made of vinyl, latex, and nitrile are available.

Be sure to wear the Be sure to wear the proper type of glove proper type of glove for for the specific chemical hazards encountered in the specific chemical hazards encountered in each experimental situationeach experimental situation..

Gloves should never be worn outside the labGloves should never be worn outside the lab..

Always wash your hands thoroughly to remove any potential chemical residues before you leave the lab.

Washing HandsWashing Hands

Lab Safety EquipmentLab Safety Equipment

In case of an emergency, you should know the location and proper use of all the safety equipment provided in the laboratory.

Always immediately Always immediately inform the instructor inform the instructor of of any accidentany accident..

Fire ExtinguishersFire Extinguishers

(1)Aim nozzleat base of

fire.

(2)(2)Pull outPull out

locking key.locking key.

(3)Squeezehandles.

Slide 7a-Fire Extinguishers

Carbon dioxide fire extinguishers are suitable for many of the potential fire hazards in the general chemistry laboratories.

To operate this type of fire extinguisher, aim the aim the nozzle nozzle at the base of the fireat the base of the fire, pull out the locking pull out the locking keykey and depress the handles togetherdepress the handles together.

This will release a discharge of carbon dioxide that will smother the fire.

Always inform the instructor Always inform the instructor of the use of a of the use of a fire extinguisher so that it can be rechargedfire extinguisher so that it can be recharged..

Safety Safety EyewashEyewash

Any Any chemical chemical contacting one’s contacting one’s eyeseyes should be should be immediately and immediately and thoroughly rinsed thoroughly rinsed outout using the using the safety eyewash safety eyewash found in every found in every laboratory.laboratory.

Push handle to startthe flow of water!

Position headbetween spigots.

Slide 9a-Safety Eyewash

• Position the Position the head with eyes head with eyes open between open between the the spigotsspigots..

• Push the handle Push the handle to start the flow of to start the flow of water.water.

• Flushing for Flushing for 15 minutes 15 minutes is standard is standard (minimum) procedure.(minimum) procedure.

Safety ShowerSafety Shower

Any chemical spill on a person should be washed off immediately and thoroughly using the safety shower.

Pull the chain to startPull the chain to startthe flow of water!the flow of water!

Slide 10a-Safety Shower

• Remove all contaminated clothing and Remove all contaminated clothing and stand under the shower.stand under the shower.

• Pull the chain to start the flow of water.Pull the chain to start the flow of water.

• Washing should continue long enough to Washing should continue long enough to insure complete removal of the chemical, insure complete removal of the chemical, at least 15-20 minutesat least 15-20 minutes..

Any chemical spill on a person Any chemical spill on a person should be washed off immediately and should be washed off immediately and

thoroughly using the safety showerthoroughly using the safety shower..

Fire Fire BlanketBlanket

In case of a clothing fire, a fire blanket should be used.

Remove the fire blanket from its container using the straps.

Wrap it around the person to completely cover the person and smother the fire.

Emergency Gas/Electrical Emergency Gas/Electrical Shut OffShut Off

Locate theLocate thecontrols in yourcontrols in yourlaboratorylaboratory..

Be sure to Be sure to understand howunderstand howthey operatethey operate..

Slide 12a-Emergency Gas/Electrical Shut Off

In most laboratories a single valve and circuit breaker assembly will allow for the complete shut off of gas to all outlets and power to most outlets.

Locate the controls in your laboratory and Locate the controls in your laboratory and be sure that you understand how they be sure that you understand how they operateoperate..

Sand Sand Ansul Ansul andand BicarbonateBicarbonate

ACIDMETAL

Slide 14a-Bicarbonate, Sand, Ansul Containers

Located on lab benches are containers of sodium bicarbonate to neutralize acid spills, plus sand and Ansul containers for small fires.

These work by covering either the spill of acid or the fire with a solid.

Each needs to be cleaned up and disposed of in a specific manner.

Be sure that the instructor is notified if any of Be sure that the instructor is notified if any of these materials have been used.these materials have been used.

Safety CardSafety Card

Slide 15a-Safety Card

In each laboratory emergency instructions are enumerated on a regulation safety placard.

Find and read the one in your laboratory.Find and read the one in your laboratory.

The 112 number can be dialed from any campus phone. Or, call directly the Campus Safety Department, to provide you with emergency assistance or instructions at any time.

There is a phone located in or near each lab. There is a phone located in or near each lab. Locate the one in your laboratory.Locate the one in your laboratory.

Special Caution-Handling GlasswareSpecial Caution-Handling Glassware

Lubricate glasssurfaces.

Protect hands.

NEVER forcethe glassware!

Slide 16a-Special Caution Handling Glassware

Many laboratory accidents involve cuts or puncture wounds due to improper manipulation of glassware.

Never Never force a piece of glassware force a piece of glassware when when constructing experimental apparatus!constructing experimental apparatus!

Use proper hand protection and lubricants such as glycerin or soapy water when possible.

Waste DisposalWaste Disposal

Discard waste as neededDiscard waste as needed, during , during and at the end of each laboratory period.and at the end of each laboratory period.

Waste Disposal Waste Disposal

Specific guidelines Specific guidelines need to be need to be observed for observed for waste disposal.waste disposal.

Waste Basket

Paper ProductsPaper Products

Paper products that do not contain chemicals can be placed in the waste baskets.

Waste Basket

Broken Broken Glassware CrockGlassware Crock

Broken glass or single-use glassware should be placed in the broken glassware crocks after any disposable contents have been removed.

Solid and liquid chemicals need to be placed in appropriate containers.

The exact means will be given in the lab procedure or specified by the instructor.

Solid and Liquid ChemicalsSolid and Liquid Chemicals

Never rinse chemicals down the drain!Never rinse chemicals down the drain!

Material Safety Data SheetsMaterial Safety Data Sheets

MSDS information for chemicals can also be accessed from the MSDS information for chemicals can also be accessed from the UM Web site at http://www.umich.edu/~oseh/msdslink.htmlUM Web site at http://www.umich.edu/~oseh/msdslink.html

Learning to work safely in the laboratory is as Learning to work safely in the laboratory is as important as important as learning the chemical concepts learning the chemical concepts and and

techniques involved in each experimenttechniques involved in each experiment..

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