Main hazards in a chemical laboratory
Contents
1. 5 ey path run H Fight the fire Fire fighting training every autumn organized by SSHE Fire fighting equipment in the corridors Extinguishers Sand Fire blanket SGU 154 ot Cani dm Fire extinguishers GU is Latest Cam t Further Documentation Notfalle im Labor was tun Emergencies the Lab What to Do How to Play it Safe at ETH Zurich What to Do in an Emergency Salaty Security and Environment SSHE ETH zurich ZUt It _ https www ethz ch services de service sicherheit qesundheit umwelt dokumente html Laborsicherheit SGU 156 eal i emr In Case of Emergency Apply to Key Rules https www youtube com watch v tSoHs1hOUFk SD is ETH zurich wu Questions2. Stay calm call 888 Secure the area Apply first aid amp wait for ETH first aid team Give necessary information to emergency services but to nobody else gt no contact to media Do not walk around gt avoid contamination Do not clean the area where the accident happened gt might be evidence e __ 64 ot Cani dm Feuer was tun dis Fire how to react Alle Notfalle All emergencies 888 SGU Batezet Cani tdm eel i mmt Alert phone fire alarm button e nere did it happen e at did happen 1 OW IT is are involved in did it happen How did it happen s at else could be important Whois calling SGU Babe tect Cana dmt ual ij sms 1 50 Rescue People Close all doors Leave the building immediately Close doors Go to Assembly Point H nggerberg HXE Zentrum ASVZ Sporthalle 151 Assembly Point ETH Honggerberg In front of building HXE ore Cem BENED eN gt C wap NN HZC D d y HZB Y e Cm HKK HZA HZ 2 3 Sammelplatz Assembly point 0 SGU 152 HWA 2 Assembly Point ETH Zentrum In ASVZ Sporthalle em Uni Spital Nord 6 9 ETH Zentrum Universitatsspital ono 4 K E Sammelplatz Assembly point SGU 153
3. The piece of meat protected by a glove isn t chemically burned Also the glove remains intact Chemical burn Consequences gt Wear gloves and safety glasses gt Work in a fume hood _ 60 T E Cans tdm wll mm Hydrofluoric acid HF Highly corrosive liquid Strong contact poison Chemical burn of lower tissue layers even bones Symptoms of exposure may not be immediately evident http www glasmalerei de techni gt interferes with nerve function ken aetzen aetzen 1 index html gt initial chemical burns may not be painful accidental exposures can go unnoticed Rule a burn the size of your palm is fatal 440 Cres Sodium hydroxide NaOH Can decompose proteins and e N T P2 t KC lipids in Skin eyes RE 8 8 gt chemical burn ec Ze 8 Dissolution of solid NaOH 27 2 exothermic resulting heat cause heat burns or ignite flammables m E v Exothermic reaction with acids Corrosive to some metals e g LEE gt produces flammable gas Sie E Kater Caria dmt rail geet H VH T Ammonia d Characteristic pungent smell Irritating caustic effects on eyes and skin Easily resorbed through the skin Inhalation gt irritating harmful effects on the respiratory system acute effect gt respiratory disorder chronic effect
4. E S __ SGU MK Caria lt allge 23 Laminar flow box Functional principle Room air is sucked in the laminar flow box and filtered e g HEPA filtration gt creation of a sterile atmosphere Laminar flow reduces turbulences of particles present in air and discharges them downward Recirculation of air within the box to the room gt Laminar flow box fume hood SGU T Vaters Cans tdm owl eee Laminar flow box When working in a laminar flow box box Need of a sterile atmosphere gt often biological work gt osafety ets source http zocker0815 npage de gedanken html Need of a dust free atmosphere gt optics gt analytics gt electronics SGU CGessfet si UU mmm 25 ETH zurich a hazards ina chemical laboratory Part 1 Chemical products gt Hazardous chemicals Acids and Bases HC NaOH HNO KOH 50 _ Ca OH 2 H CCOOH NH3 H3CNH2 gt 69 vnd http nutritionalmuscletesting com web_images acid_20base_20balance gif 27 Chemical burn Danger Acids can cause chemical burns on the skin Model Nitric acid on meat with and without protective gloves 2GU Chemical burn SGU Vates wll ome Observations The piece of meat turns immediately white when it gets in contact with the acid gt chemical burn
5. Never evacuate cylindrical or cubic glassware only round flasks Make sure that equipment Is vacuum proof ETH zurich n Ti oM abt tit TL Main hazards chemical Shee Part 2 Other hazards gt High pressure High pressure Explosion Hazard depends on physical condition 200 bar liquid e g HPLC less hazardous than 200 bar gas pressure e g gas bottle Make sure that equipment Is high pressure proof Reactions procedures with more than 10 bar gas pressure gt work in high pressure labs _ 22U gt inform SSHE ETH zurich m a ui ut bog se Hun Ge UK Main hazards a chemical laboratory Part 2 Other hazards gt Sharps ETH zurich Sharps Syringe needles scalpels Injuries Potential source of contamination with chemical biological infectious radioactive material Needle stick injuries Often occur when recapping needles immediately dispose of syringe and needle Never place any sharps in the ordinary trash bin Common causes for lacerations Picking up contaminated pieces of broken glassware Working with damaged glass equipment SD E Special Sharp Containers Unbreakable puncture proof sealable Place sharps container within easy reach Dont walk around when carrying sharps Dispose of sharps immedia
6. Avoid direct contact to X cryogenics also to tubing gt Wear safety glasses and special gloves source http www phys ethz ch phys dep dienste techbetr verfluss SGU 59 Latest Camo tdm Liquid nitrogen Yet another danger 1 Liter of liquid nitrogen gt about 700 liter of gas Displaces oxygen from the air content of O in the air What happens source BG RCI ca 21 Normal ambient air lt 16 Expired air Loss of performance lt 11 Fire gets extinguished lt 10 Sudden loss of consciousness lt 6 8 Death by asphyxiation SGU within minutes Vater r O e Apparently harmless substances really harmless lt gt inherent dangerous Example 2 Compressed Air Gas cylinders Danger Underestimation of secondary hazards Model Valve of compressed air cylinder breaks source Schweizerischer Feuerwehrverband 62 Gas cylinders Consequences gt Use personal protective equipment gt Avoid heat sources next to gas cylinders gt Secure gas cylinders against falling gt Always use the correct pressure reducing valve gt When not in use safety cap gt Never use brute force when handling valves gt Never lubricate valves gt Label empty and defective cylinders SGU ano tdm nli mt 63 What s wrong source BG RCI W
7. Minimize waste Use official containers Separate waste Acids Bases Mercury gt the smellier the waste the Chlorinated solvents more it needs to be Non chlorinated solvents collected separately SGU 51 Cani amd Disposal of hazardous waste CNB Wednesday 09 11 am Contact Martin Frei martin freil ethz ch HCI Monday Friday 2 4 Contact Guido Krucker HPL once per month SGU 52 Cog rali eo Waste source http sorachstammtischemuenchen jimdo com blog latest news all blog posts SGU T Cano tdm rali ETH zurich Main hazards ina chemical laboratory Part 1 Chemical products gt Apparently harmless substances Apparently harmless substances really harmless lt gt inherent dangerous Example 1 Nitrogen The air consists of almost 80 nitrogen Nitrogen is not flammable not toxic odorless gt absolutely harmless SGU 56 Liquid nitrogen Danger Apparently harmless substances gt Risk is underestimated 4 7 Model Rose in liquid nitrogen Liquid nitrogen Observations SR The rose cracks after removing it from the liquid nitrogen bath 196 C Even very cold substances can be liquid gt cryogenic liquids 2GU Vater Liquid nitrogen Consequences Hs gt
8. Cogs fee Lab safety some more rules Wear appropriate clothing gt long trousers robust and closed shoes safety rules I thought there was room for interpretation Wear appropriate PPE safety av glasses lab coat etc What we want to avoid source 2 http nobel scas bcit ca debeck_pt science safety htm 111 Overnight Machttafel Overnight Experiment Stab SGU ETH Zurich Nachttafel fur Experimente Overnight Experiments Gebaude und Raumnummer Building and room number Datum und Uhrzeit date and time Verantwortliche Person und Stellvertreter responsible person and deputy Name private Telefonnummer vate Tal number elefonnummer number NEUE Reaktion experiment reaction Beschreibung description emiten solvents Ke media Spezielle Gefahren Particular hazards Geeignete Loschmittel Wasser Kohlendioxid CO Suitable extinguishing agents Water carbon dioxide Notfallmassnahmen Emergency measures Datum und Unterschrift date and signature SGU Cog dmt eli mmt 112 ETH zurich Personal Protective Equipment STOP Personal protective equipment Lab coats Protection of lab personnel environment and samples Mandatory in all micro biological and chemical labs and when handling hazardous substances e g liq N special w
9. 42 2008 html gt 69 Some more rules Caution no water near oil bathes gt preferably use DrySyn systems Keep flammables and gas cylinders away from heat sources Beware of secondary hazards e g Laser beam open gas ETH zurich n Ti oM abt tit TL Main hazards chemical Shee Part 2 Other hazards gt Magnetic fields Magnetic fields Hazardous effect depends on the strength of the magnetic field description intensity 0 5mT 5G Maximal field authorized for public wearers of pacemakers or implants pregnant women 3mT 30G Field starting from which ferromagnetic objects can be dragged by the field 02T 2kG Field starting from which the access is unauthorized without medical recommendation Restrictions no access for Public wearers of pacemakers or implants pregnant women Any ferromagnetic object e g tools Any except with medical recommendation Magnetic fields Protective measures gt Mark the dangerous zone line on the ground gt Keep out If you are not authorized gt Warning signs prohibitions GU E ETH zurich m a ui ut bog se Hun Ge UK Main hazards a chemical laboratory Part 2 Other hazards gt Vacuum Implosion Protective measures shielding windows safety glasses etc
10. CIS H Acute inhalation hazard L Metabolized to carbon monoxide gt eventually CO poisoning Acute exposure by inhalation gt optic neuropathy hepatitis Prolonged skin contact gt possibly dissolving of the fatty tissues in skin gt skin Irritation or chemical burns DCM might be carcinogenic SGU E Hexane He Acute toxicity low mild anesthetic gt first a state of mild euphoria gt followed by somnolence with headaches and nausea Chronical toxicity well known in humans gt Extensive peripheral nervous system failure Initial symptoms tingling cramps in the arms and legs then general muscular weakness Suspected of damaging fertility SGU Test Tetrahydrofuran THF A Penetrates the skin gt rapid dehydration Serious eye irritation Respiratory irritation Greatest danger tendency to form highly explosive peroxides on storage air gt often inhibitor added in commercial samples gt THF should not be distilled to dryness because the explosive peroxides concentrate in the residue SGU Batezet Cani tdm eel i mmt Inflammable chemicals SGU Vater Cani y dm wll mmm Danger Inflammable substances can ignite or be ighited and cause fires and burns http www arbeitsschutzfilm de mediath ek youtube explodierende gasflaschen auf der autobahn vun video 984c63331 html Inflammable chemicals Ignition point Combustion
11. ETH zurich WE 7 m ge d D 27 d p s a How to play it 5 Basic Course October 28 2015 Evelyn M chler SSHE CABS oebastian Ziegler SSHE CABS Program 1 Main hazards in a laboratory Part 1 chemical products Part 2 other hazards Risk analysis Where to find information Dealing with hazards Minimization of risks 2 3 4 Personal Protective Equioment 5 Emergencies How to react 6 Questions 200 E Vater tdt Coffee break 10 o clock 11 o clock 2 in HG F Stock mention how to play it safe in a lab at the cash desk GU Vater D ETH zurich m a ui ut bog se Hun Ge UK Main hazards chemical laboratory Part 1 Chemical products Chemical products in everyday life at work Chemicals can be found almost everywhere e g Cleaning agents solvents batteries medical products drugs fuels matches photography SGU Vater Cani y dm ml 5 Attention Chemicals are also hazardous fires burns chemical burns intoxications allergies explosions damages of skin or tissues damage of materials danger for the environment 200 ETH zurich n Ti oM abt tit TL Main hazards chemical S
12. Oral incorporation gt severe damages of the digestive tract Pungent smell first warning ___90 Poisoning with ammonia occurs seldom as Solvents SGU Nate acetone acetonitrile dichloromethane ethanol ethyl acetate hexane tetrahydrofuran Acetone pq Degreases the skin Only slightly toxic in normal use Most hazardous property extreme flammability Temperature greater than flash point gt air acetone mixtures 97 5 2 5 vol96 8 7 2 12 8 vol may explode or cause a flash fire Vapors can ignite sources and flash back Static discharge may ignite acetone vapors SGU veel ie Solvents SGU Cans amd onm 1 Danger Damage of material or deleterious effects on skin Consequences Skin protection and care comprises gt Use of gloves gt Use of hand cream H a Acetonitrile wk KS lt gt Metabolized to hydrogen cyanide gt the onset of toxic effects Is delayed about 2 12 hours source Sympt oms re ath http www topftruits de html_datasheet php or products id21810 difficulties slow pulse rate nausea and vomiting gt Serious cases convulsions and coma followed by death from respiratory failure source http www hoio ch index php id 1103 SGU Le Test Dichloromethane DCM Cries High volatility
13. Penetration limit Inward leakage rate 95L min air flow FFP 1 gt 80 lt 22 FFP2 gt 9496 8 FFP3 gt 99 Make sure the dust mask suits you not only filter class is important FFP 3 different mask types SD ETH zurich Emergencies How to react Emergency Numbers Important emergency numbers on all ETH phones ETH Emergency Desk 24 7 External services 0 118 fire brigade 0 144 ambulance from internal phones 888 ntoxication from external phones 044 342 11 88 0 145 Tox Center councelling _SGU 142 Possible Emergencies Accident Fire SGU 143 Sa Cana mde ual Accident 2 Nothilfe leisten Unfall was tun Accident how to react 1 Verletzungsart 2 immer Alarmieren Kind of injury gt Call S 0 S Schwerer Unfall Severe accident d Vergiftung 0 145 Poisoning 7 First Aid 144 Alert phone nere did it happen nat did happen How m is are involved in did it happen How did it happen What else could be important Who is calling SGU val 1 mmm 1 45 First Aid First Aid Zip Bags n corridors staircases Eye showers Emergency showers Help the internal First Aid Team SGU 146 rs showe Eye gt 4 Key Rules First priority Always YOUR OWN SAFETY
14. and burn the skin as a result of direct or diffuse beam viewing May ignite combustible materials and thus may represent a fire or explosion risk Wear protective eyewear GU n Vae Cres Laser Labelling Warning sign Indication of laser class and instructions SGU P Test Additional labelling laser classes 3B and 4 Laser data Laser medium _ Wave length Duration of emission Radiation efficiency Radiation energy Warning lamp in front of the door DON T ENTER source http www goebel laser de html warnen html source http www laser2000 de index php id 2370356 200 ETH zurich n Ti oM abt tit TL Main hazards chemical Shee Part 2 Other hazards gt Heat sources Heat sources a lab open fire Bunsen burner hotplate sand bath oil bath light sources Lasers light bulbs d TKA ies SGU T Vater Cano adm Heat sources a lab E Basic rules Dont touch hot surfaces this rule seems to be quite obvious but Hot surfaces look the same as cold surfaces gt mark them with a warning sign Check electric installation temperature control etc SGU regularly Cano tdm rali Heat sources a lab source http www dechema de Presse Pressemitteilungen Archiv 2008
15. aste etc Not allowed at desk in cafeteria in offices etc To be washed regularly for laundry service contact SSHE n biosafety labs level 2 disinfect after contamination JORGE CHAM 2010 BACKWARDS WRONG SIZE ODD BUT KINDA THEY ONLY HAD MEN 114 MAKES SIZES AVAILABLE Vater Cog tdm eel i mmt EYE PROTECTION __ SGU p Sa Safety goggles ebe Protection of lab personnel Mandatory when Risk of splashes aerosol production dust production Spill cleanup Handling chemicals including solvents or cryogenic liquids Working with lasers class 3B and 4 safety dos Cutting glass for Oers Dont wear contact lenses not even in combination with safety goggles gt When 1 person is doing such work in the lab all others have to wear safety goggles too SGU F li Safety goggles two Optically corrected safety glasses be obtained via SSHE Normal glasses don t replace safety goggles SGU 117 ot Cri gt tet HAND PROTECTION ti SD Cries Gloves Protection of lab personnel environment and samples Regularly check and replace re usable gloves never re use single use gloves Mandatory when contact with hazardous substances or pathogenic material cannot be excluded handling cryogenic liquids liquid 2 etc or dry ice gt Replace gloves af
16. ate Formaldehyde 35 Gasoline Glutar dialdehyde Heptane 98 1 Butanol 2 Hexane HCI SGU 132 rali emrt Sources of Information Safety data sheet GESTIS Substance Database http gestis en itrust de nxt gateway dll f templates fn default htm vid gestiseng sdbeng htto www ansell com http kcl de http www mapa professionnel com sa QU 133 Acetone MSDS protection of hands Wear protective gloves Material of gloves Butyl rubber thickness 0 7 mm The selection of the suitable gloves does not only depend on the material but also on further marks of quality and varies from manufacturer to manufacturer Penetration time of glove material Value for the permeation Level 2 6 The exact breakthrough time has to be found out by the manufacturer of the protective gloves and has to be observed As protection from splashes gloves made of the following materials are Suitable Natural rubber aren _ SGU 134 Gloves To be removed before Working at desk office space Touching computer keyboards door handles telephones etc Leaving the lab How to remove gloves SGU 135 bet Cani dmt eel i mm RESPIRATORY PROTECTION SGU Cog twee Respiratory protection Respirators d d HANCHHAL HASSE ee CH dere 309 Mandatory when risk of toxic gases chemical vapors smoke All potentially expose
17. c procedures e BEER 2 Sou 4 104 Courses and seminars organized by SSHE gas cylinders biosafety laser seminar radiation protection disposal of hazardous waste working with nanoparticles fire fighting training etc gt SSHE course calendar httos www ethz ch services de service sicherheit gesundheit umwelt aus und weiterbildung kurskalender html SGU 105 STOP Organisational measures ii Labels signs gt Hazard symbols warning signs obligations E access restriction available from the SSHE gt stickers ethz ch gt Employees have to know what they mean and how to behave gt Use signs when necessary but never warn of non existing hazards 106 Lab safety some general rules Entrance only for people working in the lab No food and drinks in the lab Disorder amplifies the risk gt keep your working area clean Never do risky work alone gt there must always be a second person in the same room things often look the same as cold things gt be careful Experiments running over night gt secure all media cooling water etc sa QU Disorder amplifies the risk Vt 29d 108 Vatt Cana mde ual Risky work SGU 109 Latest Can dmt ruli mm Never do risky work alone source http de wikipedia org 5 SGU
18. d people have to d 9 Sey ww wear one 2 ft 2 Types 2 S M E en Dependent on r circulating air Independent of circulating air T ec r2 P ETE eROGER WWWKARIKATUR CARTOON DE e LEE lt S i 7 ree 7 eege Ge Original Artist CHRIS production rights obtainable from waw Cartoonstock com SGU 137 omi mmt Respiratory protection Respirators Masks dependent on circulating air A Full face masks Be B Half masks source http www ritz arbeitsschutz de industrie atemsc hutzmasken halbmasken index ht ml source http www pps vertrieb de maske sfera viret Een silikon vollmaske htm markenshop com source http Awww schutzbusshop de Moldex Halomasken Set 8982 mit A1B1E1K1 P3 R D Filter _ 60 mi MK Caria lt allge E Respiratory protection Dust Masks M Some basics Mandatory when risk of hazardous dusts aerosols All potentially exposed people have to wear one Doesnt protect against chemical vapors or toxic gases Doesnt protect against lack of oxygen Doesn t replace a fume hood Surgical masks dust masks SGU 139 Dust Masks Surgical face mask no FFP class Filter classes 3 classes according to European standard EN149 2001 2009
19. e glove on a molecular level breakthrough time min h Requirements for gloves Aim Unimpaired working performance and at the same time highest possible protection Ergonomic fit High quality materials Practice oriented in terms of tactility grip skid resistance interior climate Durability lifetime SGU abe tet Cog dmt eli 127 Protective Gloves against Chemicals Glove considered resistant to chemicals when it reaches a protective index of at least class 2 against three of the twelve test substances Test substances A Methanol B Acetone C Acetonitrile D Dichlormethane E Carbon disulfide F Toluene G Diethylamine Tetrahydrofurane 1 Ethyl acetate J n Heptane NaOH 40 95 L 50 96 96 Protective index according to EN 374 1 breakthrough time Class 1 gt 10 min Class 2 gt 30 min Class 3 gt 60 min GU breakthrough time Class 4 gt 120 min Class 5 gt 240 min Class 6 480 min 128 Protective Gloves against Chemical Risks p m Protective Gloves against Chemical Risks Comparison of Different Glove Materials Nitrile Latex ew Acetone Medium resistance Toluol Medium SD 131 amp rien Plus Chemical Resistance Breakthrough time Protective in minutes index 0 6 Ethanol Ethidium bromide in Ethyl acet
20. hat s wrong source BG RCI SGU waj 65 ETH zurich m a ui ut bog se Hun Ge UK Main hazards a chemical laboratory Part 2 Other hazards Some other common hazards in a chemical lab Lasers Heat sources Magnetic fields Biological agents pathogens GMO Centrifuges High voltage power current Vacuum or high pressure Sharps and glassware sa QU P ETH zurich m a ui ut bog se Hun Ge UK Main hazards a chemical laboratory Part 2 Other hazards gt Lasers Cries Laser non ionising radiation 4 Classes Class 1 Safe under all conditions of normal use Class 2 Visible light lasers Fairly safe blink reflex will limit the exposure to no more than 0 25 seconds if not viewed through optical instruments Do not stare into beam GU Se source luminapolis com en 2010 01 deutsche nationalbibliothek interaktive laserskulptur 69 Laser non ionising radiation s considered safe if handled carefully with restricted beam viewing The maximum permissible exposure can be exceeded low risk of injury He If the is exposed directly in some cases it can t for the Laser non ionising radiation Class 4 Can cause permanent eye damage
21. hee Part 1 Chemical products gt Labeling Labeling Danger symbols Labels on bottles SGU veel mmt Leschtentz ndlich ch dlich Atzend komprimierte Gase e e Brandf rdemd Hochentzundl ich Sehr giftig OOD SO Umweltgefahriich Hazard and safety indications on lab doors Labeling DS GU Vater D Labeling A A Warning signs On entrance doors A A A On cabinets GU Vater Cano y dm ate Cries Labeling Mandatory signs entrance doors On machines GU Right or wrong SGU 13 ETH zurich CT ith wl ai wi ja me Main hazards ina chemical laboratory Part 1 Chemical products gt How to work with chemical products in a lab How to work with chemical products in a lab Fume hood Laminar flow Glove Box source http www waldner lab de de source http ssfp unileoben ac at Laminar htm source http en wikipedia org wiki service galerie fotos aspx File Glovebox jpg SGU Vates Cani amd mt wll ome 15 Fume hoods Why working in a fume hood Prevent toxic harmful or corrosive gases vapors dust particles aerosols etc from spreading into the ambient air Prevent formation of explosive gas mixtures inside a fume hood Protection against splashes and splinters W
22. hen working in a fume hood When conducting experiments procedures which might release harmful or hazardous gases vapors dust and aerosols SGU Fume hoods SGU veel ie Some basic rules Check fume hood is ON with a piece of paper Only work in laboratory scale Always wear PPE such as safety glasses labcoat and gloves Keep front window closed Fume hood storage place Fume hoods exhaust front window gt Keep front window closed 560 Cano adm Fume hoods exhaust front window gt Make sure that airflow circulation is not disturbed by large equipment in the fume hood SGU Sa Cani dmt ual 17 19 Fume hoods exhaust front window gt Place heat sources in the rear part of the fume hood 2GU Vater What is wrong GU B 21 Natu Glove box What is a glove box Sealed container to manipulate compounds objects ina separate atmosphere Objects substances have to be introduced into and removed via an alr lock source http en wikipedia org wiki File Glovebox jpg SGU 22 Cans amd es Glove box When working in a glove box To work with hazardous substances in a specially filtered atmosphere To manipulate substances in an inert gas atmosphere e g argon nitrogen AE
23. nts e Physical and chemical prope Possible hazards Toxicology First aid measures e Ecotoxicology Fire fighting measures e Transportation Handling and storing Legal aspects SGU 1 Cana tdm ollm Where to find information on chemicals Online databases gt e g GESTIS also available as Apple and Android GESTIS For non commercial new chemicals scientific publications SGU Vater Cana dmt veel i mm 94 ETH zurich E wy e l n 2 7 s M s ine 7 5 ze Dealing with Hazards Minimization of Risks Dealing with hazards minimization of risks Before the experiment Check and consider safety instructions Define exactly the work flow and procedures Check experimental setup Minimization of risks During the experiment Apply safety measures Use protective equipment Protect people environment and values Minimization of risks After the experiment Clean up your workplace before you act sort recycle your waste In case of doubts Turn off all media cooling water electricity gas etc or questions contact an expert SGU Vater Cani y dm wll mmm Dealing with hazards The STOP concept Strategic measures Hart CERS M Technical measures Organizational measures Personal
24. point Flash point Explanation Ignition point Vapors are ignited by an ignition source combustion stops after removal of the ignition source Combustion point Vapors are ignited by an ignition source continue burning after removal of the ignition source Vapors ignite spontaneously Inflammable chemicals Explosive mixtures no more explosive substance _ LEL vol UEL vol upper explosion limit UEL ether 1 7 36 0 ethanol 3 4 15 0 gasoline 0 6 8 0 hydrogen 4 0 75 6 _ SGU as CV Cars tdm No smoking _ SGU E Cans tdm wll mm No food and drinks in a lab SGU 45 A Cg _ nma mmm What is wrong SGU Batezet Cani tdm eel i mmt What is wrong __ 560 s A nma What is wrong Gefahrliche Stoffe niemals in Getrankeflaschen Gethmopittooramme beachten e Getihitche Stove Crigmarvernactung uvm u ren umien suvapro SGU p Vaters Cans tdm rali eo ETH zurich n Ti oM abt re 41 AN Main hazards chemical laboratory Part 1 Chemical products gt Waste disposal Disposal of normal waste Minimize waste Separate waste Paper and cardboard Glass and bottles PET Metal Electrical waste Used CD DVDs E Disposal of hazardous waste
25. protective equipment STOP Strategic measures Check if there are less hazardous products available Substitution gt e g heptane or pentane instead of hexane Check for safer procedures gt e g DrySyn instead of oil bath 7 560 Valete ual ij 1 00 STOP Strategic measures Check for hidden secondary hazards gt e g laser class 4 produces not only light but might also cause fire Preferably use small quantities of chemicals gt e g small scale reactions large scale only with optimized parameters sa QU E TT TTL E u STOP Technical measures Separate work areas some work e g radioactivity biohazard need special labs Gas detection gt when working with hazardous gases liq N depending on quantity gt contact SSHE SGU Batezet Cani tdm 1 mmt 1 02 STOP Technical measures Shielding gt e g shatter protection shields lead shields for gamma radiation Ventilation fume hood local exhaust ventilations gt no hazardous work in non ventilated areas handling harmful chemicals soldering sa QU STOP Organisational measures Instruction training 7 SOP s gt Mandatory supervisor 15 responsible for instruction training employees have to work according to them gt Also for students visitors maintenance personnel etc gt Set 5 for specifi
26. tely after use Don t overfill sharps container Seal it when it is 34 full and take it to the hazardous waste disposal station SGU P Cog rali eo Contaminated Sharps sharps contaminated with infectious material Have to be inactivated before disposal gt collect in autoclavable sharps containers gt autoclave gt dispose SGU CGessfet si UU mmm 88 What is wrong ETH zurich a E Het Risk analysis _ where to find information For standard procedures Checklists All important issues to be checked on one list For general procedures and hazards available from the SUVA www suva ch Checkliste Sauren und Where to find information on specific hazards Machines equipment gt user s manual supplier Laboratory hazards NS SS gt DGUV Working Safely in Laboratories d Basic Principles and Guidelines A http bgi850 O vur jedermann de index s gt ETH SSHE factsheets guidelines concepts https www ethz ch services de service sicherheit gesundheit umwelt dokumente html Vater eel i mmt Where to find information on chemicals Ammonia Anhydrous ANNEE On the product label on the bottle can wee 7 n the MSDS Material Safety Data Sheet oubstance production company Personal protective equipment PPE Detailed conte
27. ter max 2 h wash hands and use hand cream GU 119 COLD SGU Var Cana mde veel Umm Protective Gloves against Cold Norm EN 511 for all gloves which protect against EN 511 2006 convection cooling and contact cooling up to 50 C Additionally these gloves must at least belong to performance class 1 231 Convection Water permeation according to norm EN cooling 0 4 test 0 1 388 regarding abrasion Contact resistance and tear cooung 19 propagation 290 121 Protective Gloves against Cold 122 Protective Gloves against Cold Liquid Nitrogen ir the removal of the blisters Source P Roblin A Richards R Cole Burns 23 1997 638 640 Handling of test tubes with tongs tweezers which were deep frozen in liquid nitrogen person wore protective gloves No direct contact with liquid N Years of working experience SGU 124 Protective Gloves against Chemical Risks Waterproof only little protection against chemical risks NOT resistant against chemicals Good degradation and penetration characteristics protects against permeation by chemical P substances a Degradation durability soaking Penetration A chemical substance penetrates a damaged spot in the material porosity through leaking stitching macroscopic permeation Permeation A chemical permeates the material of th
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