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responsibilities

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  1. While working in the science laboratory, you will have certain important _____________ that do not apply to other classrooms. You will be working with materials and apparatus which, if handled carelessly or improperly, have the potential to cause ______ or discomfort to someone else as well as yourself. responsibilities injury

  2. Laboratory Safety Rules

  3. It’s the LAW! Occupational Safety & Health Administration

  4. Use common sense. Basic Safety Rules #1 Rule: Others: No horseplay. No unauthorized experiments. Handle chemicals/glassware with respect.

  5. Safety Features of the Lab safety shower fire blanket fire extinguisher eye wash fume hood circuit breaker switch

  6. http://lansce.lanl.gov/training/FST2004/images04/chemicals1.gifhttp://lansce.lanl.gov/training/FST2004/images04/chemicals1.gif

  7. Use common sense. Basic Safety Rules #1 Rule: Others: No horseplay. No unauthorized experiments. Handle chemicals/glassware with respect.

  8. Safety Features of the Lab • safety shower • fire blanket • fire extinguisher • eye wash • fume hood • circuit breaker switch

  9. Material Safety Data Sheet (MSDS) gives information about a chemical -- -- lists “Dos” and “Don’ts;” emergency procedures

  10. a one-time exposure causes damage e.g., e.g., Chemical Exposure acuteexposurechronicexposure damage occurs after repeated exposure reaction to drugs or medication smoking, asbestos

  11. LD50 the lethal dosage for 50% of the animals on which the chemical is tested There are various ways an LD50 can be expressed. For example, acetone has the following LD50s: ORL-RAT LD50: 5,800 mg/kg IHL-RAT LD50: 50,100 mg/m3-h SKN-RBT LD50: 20 g/kg

  12. Which is more toxic? Example Chemical A: LD50 = 3.2 mg/kg Chemical B: LD50 = 48 mg/kg Chemical A is more toxic because less of it proves fatal to half of a given population.

  13. LABORATORY SAFETY Chemical Hazard Label MSDS Safety Quiz Courtesy Christy Johannesson www.nisd.net/communicationsarts/pages/chem

  14. Safety Symbols

  15. NFPA CHEMICAL HAZARD LABEL FLAMMABILITY HEALTH REACTIVITY (STABILITY) SPECIAL

  16. NFPA CHEMICAL HAZARD LABEL 4 Most Serious 0 Least Serious 4 0 4 3 2 Flammable vapor which burns readily Substance is stable

  17. NFPA CHEMICAL HAZARD LABEL Burns readily. 4 May detonate with heat or ignition. Severe health risk. 4 3 W Avoid water. Diborane

  18. Fire Hazard(red) Flash Point Temp. NFPA Label 4 – below 73oF Temp. 3 – 73 to 100oF – v. flam. 2 – 101 to 200oF – flam. 1 – over 200oF - slightly combustible 0 – will not burn Chem. name Health(blue) 4 – deadly 3 – extreme danger 2 – hazardous 1 – slightly hazardous 0 – normal material Reactivity(yellow) 4 – may detonate 3 – shock or heat may detonate 2 – violent chem. reaction 1 – unstable if heated 0 – stable Specific Hazard OXY – oxidizer ACID – acid ALK – alkali COR – corrosive W – use no water RAD – radiation hazard

  19. NFPA CHEMICAL HAZARD LABEL Complete Label for Acetone

  20. NFPA CHEMICAL HAZARD LABEL Complete Label for Phosphine

  21. MSDS Material Safety Data Sheet On file for all purchased chemicals. Includes all information shown on a chemical label and more. Different formats are used by different chemical companies.

  22. MSDS

  23. 1 Prior to 1996, this section was titled "Reactivity". The name was changed because many people did not understand the distinction between a "reactive hazard" and the "chemical reactivity" of the material. The numeric ratings and their meanings remain unchanged.

  24. This section is used to denote special hazards. There are only two NFPA 704 approved symbols

  25. Aleksza NHHS H-Chemistry 2012-13 Safety Quick Quiz Name:_____________________________________________Score:________/_10__ 1. List two safety items in our classroom: (2 points) A. B. 2. What does MSDS stand for? (2 points) 3. The blue section of the NFPA label represents which type of hazard? (2 points) 4. Provide an example of an acute exposure to a chemical. (2 points) 5. Lab safety and cleanliness is your responsibility too! (2 points) (A) True (B) False

  26. Aleksza NHHS C- Chemistry 2012-13 Safety Quick Quiz Name:_____________________________________________Score:________/_8__ _____1. Whis is not a safety item in our classroom: (2 points) A. Hood B. Goggles C. Gas Mask D. Fire Extinguisher _____2. What does MSDS stand for? (2 points) A. Material Safety Data Sheets B. Material Support Demostration Supplies C. Mother Son & Daughter Society D. Material Safety Disposal Steps _____3. The blue section of the NFPA label represents which type of hazard? (2 points) A. Flamability B. Health C. Reactivity D. Other _____4. Lab safety and cleanliness is your responsibility too! (2 points) (A) True (B) False

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