Lab Safety Presentation Dr. A.K.M. Shafiqul Islam July 9, 2008

Lab Safety Lab Safety PresentationPresentation

Dr. A.K.M. Shafiqul IslamDr. A.K.M. Shafiqul Islam

July 9, 2008

Safety FirstSafety First

Wear lab coats Wear lab coats during all during all laboratory sessions.laboratory sessions.

Wear safety Wear safety goggles during all goggles during all laboratory sessions.laboratory sessions.

Wear gloves when Wear gloves when using chemicals using chemicals that irritate or can that irritate or can be absorbed be absorbed through the skin.through the skin.

Why is Lab Safety Important?Why is Lab Safety Important?

Lab safety is a major aspect of every lab Lab safety is a major aspect of every lab based science class.based science class.

Lab safety rules and symbols are needed Lab safety rules and symbols are needed so that students do not injure themselves so that students do not injure themselves or their classmates. or their classmates.

A. General Safety RulesA. General Safety Rules

1.1. Listen to or read Listen to or read instructionsinstructions carefully carefully before attempting to do anything.before attempting to do anything.

2.2. Wear safety goggles to protect your Wear safety goggles to protect your eyeseyes from from chemicalschemicals, , heatedheated materials, or things that might be able materials, or things that might be able to to shatteshatter.r.

3.3. Notify your teacher/lab assistant if Notify your teacher/lab assistant if any spills or any spills or accidentsaccidents occur. occur.


4.4. After handling chemicals, always After handling chemicals, always wash your wash your handshands with with soapsoap and water. and water.

5.5. During lab work, keep your hands During lab work, keep your hands away from your away from your faceface..

6.6. Tie back long Tie back long hairhair..


7.7. Roll up loose Roll up loose sleevessleeves..

8.8. Know the Know the locationlocation of the fire of the fire extinguisher, fire blanket, eyewash extinguisher, fire blanket, eyewash station, and first aid kit.station, and first aid kit.

9.9. Keep your work area Keep your work area uncluttereduncluttered. Take to . Take to the lab station only what is the lab station only what is necessarynecessary..


10.10. It is suggested that you wear glasses It is suggested that you wear glasses rather than rather than contactcontact lenseslenses..

11.11. Never put anything into your Never put anything into your mouthmouth during a lab experiment.during a lab experiment.

12.12. Clean up your lab area at the Clean up your lab area at the conclusionconclusion of the laboratory period. of the laboratory period.

13.13. Never “horse around” or play Never “horse around” or play practicalpractical jokesjokes in the laboratory. in the laboratory.

B. Glassware SafetyB. Glassware Safety

1.1. Chipped or cracked glassware should Chipped or cracked glassware should not be not be usedused. Show it to the . Show it to the teacherteacher..

2.2. Broken glassware Broken glassware shouldshould notnot be be disposed of in a classroom trashcan. disposed of in a classroom trashcan. There is a There is a specialspecial glass disposal glass disposal container for it.container for it.

3.3. When pouring liquids into glassware, When pouring liquids into glassware, make sure the container you are pouring make sure the container you are pouring into is resting on a table at least a into is resting on a table at least a handsbreadthhandsbreadth from the edge. from the edge.


4.4. Pour down a glass stirring rod to Pour down a glass stirring rod to prevent liquids from prevent liquids from splatteringsplattering..

5.5. If a piece of glassware gets broken, If a piece of glassware gets broken, do not try to clean it up by yourself. do not try to clean it up by yourself. NotifyNotify the teacher. the teacher.

6.6. When inserting glass tubing into a When inserting glass tubing into a rubber stopper, apply a rubber stopper, apply a lubricantlubricant to to the glass and use a the glass and use a twistingtwisting motion. motion.


1.1. To cut glass tubing, first lay the tube on To cut glass tubing, first lay the tube on the lab table and make a the lab table and make a scratchscratch in it with a in it with a file. Then pick up the tube with the scratch file. Then pick up the tube with the scratch facing facing awayaway from you, put your thumbs from you, put your thumbs together on the opposite side as the together on the opposite side as the scratch, and scratch, and breakbreak the tube with both the tube with both hands.hands.

2.2. If you cut glass tubing, always If you cut glass tubing, always firefire polishpolish the broken ends to remove the broken ends to remove jaggedjagged edges. edges.

3.3. Do not place hot glassware in Do not place hot glassware in waterwater. . Rapid cooling may make it Rapid cooling may make it shattershatter..

Lab Safety EquipmentLab Safety Equipment

Safety ShowerSafety Shower Safety GogglesSafety GogglesEye Wash

Lab Safety EquipmentLab Safety Equipment

FireFire

ExtinguisherExtinguisher

Fire BlanketFire Blanket

Fume Hood

C. Chemical SafetyC. Chemical Safety

1.1. Wear protective goggles and a lab Wear protective goggles and a lab apronapron whenever heating or whenever heating or pouringpouring hazardous chemicals.hazardous chemicals.

2.2. Never mix chemicals Never mix chemicals togethertogether unless unless you are told to do so (and then only in you are told to do so (and then only in the the mannermanner specified). specified).

3.3. Never Never tastetaste any chemicals (you any chemicals (you should never taste should never taste anythinganything in the in the lab).lab).


4.4. If you need to smell the If you need to smell the odorodor of a of a chemical, chemical, waftwaft the fumes toward the fumes toward your nose with one hand. Do not your nose with one hand. Do not put your nose over the container put your nose over the container and and inhaleinhale the fumes. the fumes.

5.5. Never pour water into a Never pour water into a concentrated concentrated acidacid. Acid should . Acid should be poured be poured slowlyslowly into water. into water.


6.6. Follow the instructions of your Follow the instructions of your teacher when disposing of all teacher when disposing of all chemicalschemicals..

7.7. Wash your hands after handling Wash your hands after handling hazardoushazardous chemicals. chemicals.

Lab Safety SymbolsLab Safety SymbolsFound in your textbookFound in your textbook

GlasswareGlassware HeatHeat Eye and FaceEye and Face SharpsSharps

ElectricalElectrical AnimalAnimal ChemicalChemical FireFire

Other Chemical Hazards Other Chemical Hazards and Symbolsand Symbols

FlammableFlammable

ExplosiveExplosive

Toxic/PoisonToxic/Poison

IrritantIrritant

CorrosiveCorrosive

EnvironmentalEnvironmental

Chemical Hazard Symbols Chemical Hazard Symbols and Definitionsand Definitions

FlammableFlammable – Any substance that will – Any substance that will burn if exposed to an open flame.burn if exposed to an open flame.

ExplosiveExplosive – A substance that may – A substance that may explode if exposed to heat or flame. explode if exposed to heat or flame.


Toxic/PoisonToxic/Poison – A substance that can – A substance that can lead to death if inhaled, ingested, or lead to death if inhaled, ingested, or absorbed by the skin. absorbed by the skin.

CorrosiveCorrosive – A substance that can – A substance that can destroy or burn living tissue and can destroy or burn living tissue and can eat away at other materials. eat away at other materials.


IrritantIrritant - A substance that causes - A substance that causes inflammation upon contact with skin inflammation upon contact with skin or mucous membranes.or mucous membranes.

EnvironmentalEnvironmental - - Substances that Substances that are harmful to the environment. are harmful to the environment. They must be disposed of properly, They must be disposed of properly, not washed down the drain.not washed down the drain.

Food & DrinkFood & Drink

No food or drink in laboratories or lab No food or drink in laboratories or lab refrigeratorsrefrigerators

D. Electrical SafetyD. Electrical Safety

1.1. Lay electrical cords where no one Lay electrical cords where no one can trip on them or get can trip on them or get caughtcaught in in them.them.

2.2. Be sure your hands and your lab Be sure your hands and your lab area are area are drydry before using electrical before using electrical equipment.equipment.

3.3. Never poke anything into electrical Never poke anything into electrical outletsoutlets..

D. Electrical SafetyD. Electrical Safety

4.4. Unplug cords by pulling the Unplug cords by pulling the plugplug and and not the cord.not the cord.

5.5. Unplug all electrical equipment at the Unplug all electrical equipment at the end of the end of the lablab periodperiod..

E. Heating SafetyE. Heating Safety

1.1. Let burners and hotplates cool down Let burners and hotplates cool down before before touchingtouching them. Test to see if them. Test to see if they are cool enough by bringing the they are cool enough by bringing the backback of your hand close to them. of your hand close to them.

2.2. Use tongs and/or protective gloves to Use tongs and/or protective gloves to handle handle hothot objects. objects.

3.3. Never reach across an open Never reach across an open flameflame or or burnerburner..


1.1. The only type of glassware that may The only type of glassware that may safely be heated is either safely be heated is either KimaxKimax or Pyrex. or Pyrex.

2.2. Always point the top ends of test tubes Always point the top ends of test tubes that are being heated that are being heated awayaway from people. from people.

3.3. When heating a test tube, move it around When heating a test tube, move it around slowly over the flame to distribute the slowly over the flame to distribute the heatheat evenly. evenly.


4.4. Only glassware that is thoroughly Only glassware that is thoroughly drydry should be heated.should be heated.

5.5. Heat glassware by placing it on a wire Heat glassware by placing it on a wire gauze platform on a gauze platform on a ringstandringstand. Do not . Do not hold it in your hold it in your handhand..


6.6. When lighting a burner, wait until a match When lighting a burner, wait until a match is struck or the striker is in place is struck or the striker is in place beforebefore you turn on the you turn on the gasgas..

7.7. The amount of air can be adjusted by the The amount of air can be adjusted by the air supply valve below the tube of the air supply valve below the tube of the burner. This regulates the flame burner. This regulates the flame temperaturetemperature and color. and color.

8.8. Never leave a burner or hotplate Never leave a burner or hotplate unattendedunattended..

First AidFirst Aid

Injury: BurnsInjury: Burns

To do: Immediately flush with To do: Immediately flush with coldcold water water until burning sensation is lessened.until burning sensation is lessened.

First AidFirst Aid

Injury: Cuts, bruisesInjury: Cuts, bruises

To do: Do not To do: Do not touchtouch an open wound an open wound without safety gloves. Pressing without safety gloves. Pressing directly on minor cuts will stop directly on minor cuts will stop bleeding in a few minutes. Apply cold bleeding in a few minutes. Apply cold compress to bruises to reduce compress to bruises to reduce swellingswelling..

First AidFirst Aid

Injury: FaintingInjury: Fainting

To do: Provide To do: Provide freshfresh air and have the air and have the person recline so that their head is person recline so that their head is lowerlower than the rest of their body. than the rest of their body.

First AidFirst Aid

Injury: The eyesInjury: The eyes

To do: Flush eyes immediately with To do: Flush eyes immediately with plenty of plenty of waterwater for several minutes. If a for several minutes. If a foreign object is lodged in the eye, do foreign object is lodged in the eye, do not allow the eye to be not allow the eye to be rubbedrubbed..

First AidFirst Aid

Injury: PoisoningInjury: Poisoning

To do: Find out what substance was To do: Find out what substance was responsible for the poisoning and alert responsible for the poisoning and alert the the teacherteacher immediately. immediately.

First AidFirst Aid

Injury: Spills on the skinInjury: Spills on the skin

To do: Flush with large quantities of To do: Flush with large quantities of water. For acid spills apply water. For acid spills apply bakingbaking sodasoda solution. For base spills apply solution. For base spills apply vinegarvinegar or boric acid. or boric acid.

First AidFirst Aid

Injury: Electrical shockInjury: Electrical shock

To do: Shut off the current at the To do: Shut off the current at the sourcesource. . Remove wire with rubber gloves. Alert Remove wire with rubber gloves. Alert the the teacherteacher immediately. immediately.

Waste DisposalWaste Disposal

First ask your teacher where/how First ask your teacher where/how to dispose of waste.to dispose of waste.

Never pour anything down the Never pour anything down the drain unless you are told to do so.drain unless you are told to do so.

A waste bottle will be supplied for A waste bottle will be supplied for substance that cannot go down the substance that cannot go down the draindrain

Reasons for proper waste Reasons for proper waste disposaldisposal

Hazardous chemicals down the drain can Hazardous chemicals down the drain can lead to pollution of ground water, lakes, lead to pollution of ground water, lakes, rivers, etc.rivers, etc.

Plants and animals will die if they are Plants and animals will die if they are exposed to hazardous chemical waste.exposed to hazardous chemical waste.

Serious health problems will become Serious health problems will become present in people if hazardous waste finds present in people if hazardous waste finds its way into drinking water. its way into drinking water.

Pollution Facts of Lafayette Pollution Facts of Lafayette CountyCounty

Major Pollutants in the County:Major Pollutants in the County: MethanolMethanol FormaldehydeFormaldehyde Glycol EthersGlycol Ethers CopperCopper Lead CompoundsLead Compounds

In 2002 Lafayette County ranked in the the dirtier In 2002 Lafayette County ranked in the the dirtier 30% of all counties in the U.S. in terms of air 30% of all counties in the U.S. in terms of air release carcinogens.release carcinogens.

For more facts about land, air, and water pollution For more facts about land, air, and water pollution in your area go to the websitein your area go to the website www.scorecard.orgwww.scorecard.org . .

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Lab Safety Presentation Dr. A.K.M. Shafiqul Islam July 9, 2008