Lab+safety+2

Unit I: safety in the chemical laboratory (2) 1.2 Protective Equipment A. Safety Goggles [|upload.wikimedia.org/wikipedia/commons/4/49/Seal_Swim_Goggles.jpg] When to use safety goggles? - whenever chemicals are being used or glass-working is being performed. (actually we need to wear it in every lab that we do!) How to use safety goggles? - put on before the lab begins - remove after you have put away all chemicals or glasses Key points: - move the goggles onto your forehead, or left to dangle around your neck.

B. Fume Hoods [|img2.tradeget.com/modernengineering%5CPHHPX7LA1fume_exhaust_hood.jpg]  When to use fume hoods? - whenever poisonous or offensive odours are being produced. How to use fume hoods?  - simply switch the On/Off button for the fume hood (generally are below beside the fume hoods) Key points: <span style="color: #1d93cd; font-family: 'Times New Roman',Times,serif; font-size: 110%;">- do not need to pull down the sliding glass parts during the use of fume hoods - when the sliding glass part is needed, it is the time when a reaction may spatter out of the container or a there is a strong draft.

<span style="color: #c031fc; font-family: 'Comic Sans MS',cursive; font-size: 190%;">1.3 In Case Of Fire [|shineanthology.files.wordpress.com/2009/12/fire.jpg] <span style="color: #fc8540; font-family: 'Times New Roman',Times,serif; font-size: 110%;">Fire procedures <span style="color: #1d93cd; font-family: 'Times New Roman',Times,serif; font-size: 110%;"> - Notify <span style="color: #c031fc; font-family: 'Times New Roman',Times,serif; font-size: 110%;">( to let everyone in the classroom know) <span style="color: #1d93cd; font-family: 'Times New Roman',Times,serif; font-size: 110%;"> - Evacuate <span style="color: #c031fc; font-family: 'Times New Roman',Times,serif; font-size: 110%;">(get away from the fire immediately) <span style="color: #1d93cd; font-family: 'Times New Roman',Times,serif; font-size: 110%;">- Isolate <span style="color: #c031fc; font-family: 'Times New Roman',Times,serif; font-size: 110%;">( stay away from the fire after you evacuate safely) Different situations: <span style="color: #1d93cd; font-family: 'Times New Roman',Times,serif; font-size: 110%;">- controlled fires: - in a beaker, flask or test tube --- place a glass or beaker over the top of the container and smother the fire - a small amount of burning liquid on a benchtop --- use the fire blanket - uncontrolled fires: - students should be evacuated - may use a fire extinguisher - turn off the main gas supply in the room if possible - pull the fire alarm

<span style="color: #c031fc; font-family: 'Comic Sans MS',cursive; font-size: 190%;">1.4 Some Laboratory Hazards [|www.mysouthwestga.com/uploadedImages/wfxl/News/Stories/chemical%20spill.jpg] || <span style="color: #0000ff; font-family: 'Times New Roman',Times,serif; font-size: 110%;">chemical burns || <span style="color: #0000ff; font-family: 'Times New Roman',Times,serif; font-size: 110%;">-inform teacher and wait teacher to solve -stay away from the fire || [|www.reading.ac.uk/finance/opentoall/insurance/Images/Glass%201.jpg] || <span style="color: #0000ff; font-family: 'Times New Roman',Times,serif; font-size: 110%;">cuts; chemicals in cuts || <span style="color: #0000ff; font-family: 'Times New Roman',Times,serif; font-size: 110%;">- situation is dangerous (glasses mixed with chemicals)inform the teacher to solve - situation not dangerous - use bromm/dustpan and put in special receptricle || <span style="color: #800080; font-family: 'Times New Roman',Times,serif; font-size: 110%;"> [|www.greaterthings.com/News/daily/2005/10/12/6600919_Bird_Flu_Wash_Hands/wash-hands.jpg] <span style="color: #0000ff; font-family: 'Times New Roman',Times,serif; font-size: 110%;">- running water - use neutralizing solution || <span style="color: #800080; font-family: 'Times New Roman',Times,serif; font-size: 110%;"> [|cimg2.163.com/catchpic/2/2D/2D6130AED605EA26C23D242CD5F66CBF.jpg] <span style="color: #0000ff; font-family: 'Times New Roman',Times,serif; font-size: 110%;">- move the floopy clothing away ||
 * ** Hazard ** || **Nature of hazard** || **How to deal with hazard** ||
 * <span style="color: #0000ff; font-family: 'Times New Roman',Times,serif; font-size: 110%;">spilled chemicals
 * <span style="color: #0000ff; font-family: 'Times New Roman',Times,serif; font-size: 110%;">broken glass
 * <span style="color: #0000ff; font-family: 'Times New Roman',Times,serif; font-size: 110%;">burning chemicals in container || <span style="color: #0000ff; font-family: 'Times New Roman',Times,serif; font-size: 110%;">burns || <span style="color: #0000ff; font-family: 'Times New Roman',Times,serif; font-size: 110%;">stay away - inform class, deal with fire in case of fire controled fires ||
 * <span style="color: #0000ff; font-family: 'Times New Roman',Times,serif; font-size: 110%;">chemicals on hands || <span style="color: #0000ff; font-family: 'Times New Roman',Times,serif; font-size: 110%;">chemical burns; skin irritation or allergic reaction || <span style="color: #0000ff; font-family: 'Times New Roman',Times,serif; font-size: 110%;">- wash off the chemicals immediately under fast
 * <span style="color: #0000ff; font-family: 'Times New Roman',Times,serif; font-size: 110%;">being asked to smell chemical vapours || <span style="color: #0000ff; font-family: 'Times New Roman',Times,serif; font-size: 110%;">strong odours may injure nasal passages || <span style="color: #0000ff; font-family: 'Times New Roman',Times,serif; font-size: 110%;">- hold container in front of you ||
 * <span style="color: #0000ff; font-family: 'Times New Roman',Times,serif; font-size: 110%;">bursen burners || <span style="color: #0000ff; font-family: 'Times New Roman',Times,serif; font-size: 110%;">burns; fires || <span style="color: #0000ff; font-family: 'Times New Roman',Times,serif; font-size: 110%;">- wafting the odour to your nose ||
 * <span style="color: #0000ff; font-family: 'Times New Roman',Times,serif; font-size: 110%;">loose hair or "floopy" clothing/ accessories || <span style="color: #0000ff; font-family: 'Times New Roman',Times,serif; font-size: 110%;">burns or chemical spillage; equipment knocked onto floor || <span style="color: #0000ff; font-family: 'Times New Roman',Times,serif; font-size: 110%;">- tie the hair

<span style="color: #c031fc; font-family: 'Comic Sans MS',cursive; font-size: 180%;">1.5 Disposal Of Chemicals <span style="color: #3ae9ab; font-family: 'Comic Sans MS',cursive; font-size: 180%;"> 1. Disposal of Unused Chemicals <span style="color: #ffff00; font-family: 'Times New Roman',Times,serif; font-size: 125%;">Do not put unused chemicals back into their original containers! <span style="color: #1d93cd; font-family: 'Times New Roman',Times,serif; font-size: 110%;">- may put into the wrong container (spoiling chemicals or starting a reaction) - the glassware was not perfectly clean and dry <span style="color: #3ae9ab; font-family: 'Comic Sans MS',cursive; font-size: 180%;">2. Disposal of Used Chemicals <span style="color: #ffff00; font-family: 'Times New Roman',Times,serif; font-size: 125%;">read the instruction of the disposal of the chemicals before the lab carefully! <span style="color: #1d93cd; font-family: 'Times New Roman',Times,serif; font-size: 110%;">-some of them is harmless for the enviroment(disposal them carefully)

<span style="color: #c031fc; font-family: 'Comic Sans MS',cursive; font-size: 190%;">1.6 General Rules Of Safe Laboratory Conduct <span style="color: #fc8540; font-family: 'Times New Roman',Times,serif; font-size: 150%;">Conscious Safety Attitude <span style="color: #1d93cd; font-family: 'Times New Roman',Times,serif; font-size: 110%;">- no horseplay <span style="color: #800080; font-family: 'Times New Roman',Times,serif; font-size: 110%;"> [|www.chem.unl.edu/safety/labsafety/images/Image35.jpg] <span style="color: #1d93cd; font-family: 'Times New Roman',Times,serif; font-size: 110%;">- no running <span style="color: #800080; font-family: 'Times New Roman',Times,serif; font-size: 110%;"> [|www.huynen.com/no%20running.gif] <span style="color: #1d93cd; font-family: 'Times New Roman',Times,serif; font-size: 110%;">- no carrying out unauthorized chemicals - wear your safety goggles at all times - know the operation of the eye wash stations - if you spill acid on yourself, flush affected area with large amounts of cold water - never leave an unattented alcohol burner lit - never pour water into concentrated acid - never directly smell of a sample - point open test tubes away from people - never leace reagent bottles open and exposed to the air - never return excess chemicals to their original container - keep your lab area unclutterd, clean, and dry - clean up spills immediately - never contact chemicals with your skin - never heat plastic containers