Laboratory Safety

CHEM-1112General Chemistry II Lab

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Safety Requirements

• Lab Coat or Lab Apron• Laboratory Goggles• Closed shoes • Long pants or jeans

• NO shorts!

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Dress Code

Wear a lab coat or lab apron all the time• Wear long pants or jeans that cover your legs completely • Wear splash-proof goggles or safety glasses when doing an experiment

• State and Federal law require the use of safety eyewear by anyone working in a chemical laboratory.

• Splash-proof goggles are available for sale in the bookstore. •http://www.csb.gov/newsroom/detail.aspx?nid=386• Wear shoes that cover and protect your feet completely

• No sandals, flip-flops, open-toed shoes, or shoes with open sides or heels.

• If you come to the lab dressed inappropriately you will be asked to leave and you will not receive credit for the experiment 4

Dress Code

Clothing needs to cover and protect your body all the way down to your ankles, your shoulders and upper arms• shirt, blouse, jeans, long skirt, or dress

Do not wear clothing that is too loose • knock over containers on the work bench• dip into chemicals• drag into flames

• No shorts, or short or mid-length skirts• No short T-shirts, tank tops, or muscle shirts • The skin of your body must be covered

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Dress Code

Wear clothing which you don't care too much about • Some chemicals are very corrosive: strong acids,

strong bases• Tiny droplets of chemicals are very likely to get on

your clothing • Chemicals can stain your clothes• Chemicals can burn holes in your clothes

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Dress Code

Wear comfortable shoes• Sneakers or comparable shoes• No elevated or high heels!

Wear socks • extra padding and protection

Come prepared to change clothes• If you do not want to spend the entire day dressed in

your lab clothes, then bring a change of clothes • It is also a good idea to have some spare clothes in case of an

emergency

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Dress Code

Tie back long hair • Loose, long hair can also block your vision, which can lead

to accidents • Long hair can accidentally fall into flames or chemicals

Do not wear valuable jewelry while working in the lab• Necklaces and braces may catch glassware and knock it

over• Chemicals may damage jewelry

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Safety Requirements

• Lab Coat or Lab Apron• Laboratory Goggles• Closed shoes • Long pants or jeans

– No lab!(No kidding!)

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Safety in the Lab• Two exits in each lab

– Do not block the exits

• Fire extinguishers in every lab • Safety shower and an eye wash station

– Only use them in case of emergency!

• Fume hoods in every lab – For use with noxious, toxic chemicals– They should be in working condition all the time. – If there is a problem, inform the instructor

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Chemical SafetyPrepare each lab before class • Know what chemicals you will be working with• Pay attention to the introduction to the lab: there may be

specific safety instruction before each lab• Do not dispose of waste down the drain unless otherwise

instructed. Check with your instructor• All waste should be put in properly labeled containers, stored in

the ventilation hood• Read all labels carefully before disposing chemicals. Some

chemicals have similar names but very different chemical and physical properties

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Chemical Safety

Strong Acids and Bases • Know what chemicals you will be working with• When using strong acids or bases be very careful

– chemical burns– fumes– damage to clothing– splashing

• Always pour the acid or base slowly into water while stirring• Never the other way around to avoid splashing

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Chemical Safety (2)Spills

• Remove contaminated clothing and wash skin with soap and water

• If the spill is over a large area, go to the emergency showers

• If the spill is in the eyes, rinse with water at the eyewash stations

• For spill clean-up: check with the instructor• Flammable solvents: extinguish all flames• Spill reagents for acids, bases and organic solvents are

located in the labs

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Chemical Safety (3)Spills

• Notify the instructor immediately• Notify your neighbors at your lab bench!• Use sodium bicarbonate to neutralize acid spills and rinse with large

amounts of water• Use boric acid or dilute hydrochloric acid to neutralize bases. Rinse with

large amounts of water• If you break a mercury thermometer, notify the instructor immediately. Do

not touch or handle mercury!• Clean up spills immediately

• Keep the balance area clean!• Never pour liquids on the balance• Always use weighing paper or a weighing boat

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Chemical Safety (4)

Chemical and Waste Disposal• Ask the instructor about Material Safety Data Sheets

(MSDS)• Non-flammable, non-toxic, water-soluble liquids can

be disposed in the sink, after consulting the instructor• All other waste in containers designated for that

purpose

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Aqueous waste in “Aqueous Waste” containerOrganic waste in “Organic Waste” containerSolid waste in “Solid Waste” containers

Broken glass in “Broken Glass” containerNO paper towels, disposable pipettes, latex gloves, or chemicals!

RecyclablesPaper, glass and plastic bottles, Aluminum cans, etc.

Trash cans are for trash, not for recyclables or chemicals

Disposal of Chemical Waste

Solid waste in “Solid Waste” containers

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Lab Safety Policies (1)

The following rules will be enforced with dismissal or suspension• Personal protection is required

– Bookstore sells safety goggles– Lab coats or aprons need to be worn at all times

• NO horseplay, pranks, or other potentially dangerous mischief• No eating, drinking*, or applying make-up in the labs• The campus is smoke-free. Smoking is never permitted in a lab• Unauthorized experiments are prohibited• Never work alone

– Students are not allowed to work alone without supervision, unless with written permission from the instructor

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Lab Safety Policies (2)Emergency Procedures

In Case of Emergency• Stop all experiments, turn off burners and equipment

and leave the room• Report the nature and location of the emergency to

the appropriate fire, rescue or medical authorities• Do not move seriously injured people• If severe bleeding, apply pressure• Do not try to treat a cut yourself

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Lab Safety Policies (3)Fires

• Stay calm and warn the instructor• Small fires in containers can be extinguished by

covering with, e.g., a beaker• Use a CO2 or dry powder extinguisher for larger fires• If uncontrollable, leave immediately, sound alarm,

and call the fire department• If a person’s clothing is on fire, douse them with water

(showers) and wrap in fire blanket• Get immediate medical attention

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Basic Safety (1)1. Keep your work areas clean at all times2. Each student must know the location of basic safety

equipment3. Sandals and open-toe shoes are not allowed in the lab4. A labcoat or apron must be worn at all times5. Drinking, eating and smoking are not allowed in the lab6. Do not pour water in concentrated acids or bases7. Do not taste any chemicals8. Do not smell any chemicals9. Never pipette by mouth10. Never use flammable material near an open flame11. Measure volumes of liquids in a graduated cylinder

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Basic Safety (2)

12. Dispose of chemicals in an appropriate manner13. Never use chemicals from an unlabeled container14. Never place material to be weighed directly on the

balance15. Dispose of excess material; never put it back in the

original container16. Volatile, poisonous chemicals, skin-irritants, or bad-

smelling chemicals need to be handled with care in a fume hood

17. Never point test tubes at others while doing a reaction

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Basic Safety (3)

18. Laboratory gas burners (Bunsen burners) are only lit with a striker19. Bunsen burners are only used for heating non-flammable materials20. Lab burners can be used on the lab bench in the absence of volatile

chemicals21. Hot and cold objects look exactly the same. Be aware of

temperature before you touch anything22. Be careful with glassware: it can break!23. Never handle broken glass with your bare hands. Use a brush and

a dustpan to clean up broken glass.

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Basic Safety (4)

24. Experiments can only be performed when the instructor is present

25. Students need to be able to locate the fire blankets, eye wash station, emergency showers and exits

26. All used glassware must be rinsed with soapy water (if necessary), tap water and distilled water, then placed in the back of the lab for collection and further clean-up

27. Lab benches need to be wiped clean after use28. Return equipment and chemicals after use to where you

found it

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Emergency Phone Number 222-0911

Think First! Think First! Safety First!!Safety First!!

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Northwest Vista College is Tobacco-Free

• Campus police will issue tickets to smokers

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