1. Laboratory Safety CHEM-1112 General Chemistry II Lab

2. 2

3. Safety Requirements Lab Coat or Lab Apron Laboratory Goggles Closed shoes Long pants or jeans NO shorts! 3

4. 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

5. 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 5

6. 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 6

7. 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 7

8. 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 8

9. Safety Requirements Lab Coat or Lab Apron Laboratory Goggles Closed shoes Long pants or jeans – No lab! (No kidding!) 9

10. 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 10

11. Chemical Safety Prepare 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 11

12. 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 12

13. 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 13

14. 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 14

15. 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 15

16. Aqueous waste in “Aqueous Waste” container Organic waste in “Organic Waste” container Solid waste in “Solid Waste” containers Broken glass in “Broken Glass” container NO paper towels, disposable pipettes, latex gloves, or chemicals! Recyclables Paper, 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 16

17. 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 17

18. 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 18

19. 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 CO 2 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 19

20. Basic Safety (1) 1.Keep your work areas clean at all times 2.Each student must know the location of basic safety equipment 3.Sandals and open-toe shoes are not allowed in the lab 4.A labcoat or apron must be worn at all times 5.Drinking, eating and smoking are not allowed in the lab 6.Do not pour water in concentrated acids or bases 7.Do not taste any chemicals 8.Do not smell any chemicals 9.Never pipette by mouth 10.Never use flammable material near an open flame 11.Measure volumes of liquids in a graduated cylinder 20

21. Basic Safety (2) 12.Dispose of chemicals in an appropriate manner 13.Never use chemicals from an unlabeled container 14.Never place material to be weighed directly on the balance 15.Dispose of excess material; never put it back in the original container 16.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 21

22. Basic Safety (3) 18.Laboratory gas burners (Bunsen burners) are only lit with a striker 19.Bunsen burners are only used for heating non-flammable materials 20.Lab burners can be used on the lab bench in the absence of volatile chemicals 21.Hot and cold objects look exactly the same. Be aware of temperature before you touch anything 22.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. 22

23. 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 use 28.Return equipment and chemicals after use to where you found it 23

24. Emergency Phone Number 222-0911 Think First! Safety First!! 24

25. Northwest Vista College is Tobacco-Free Campus police will issue tickets to smokers 25