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Lab Safety

Lab Safety. Why Lab Safety?. Protect yourself from laboratory hazards Protect students and others from laboratory hazards Comply with State and Federal regulations Set a good example for students. Laboratory Safety Training Overview. OSHA

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Lab Safety

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  1. Lab Safety

  2. Why Lab Safety? • Protect yourself from laboratory hazards • Protect students and others from laboratory hazards • Comply with State and Federal regulations • Set a good example for students

  3. Laboratory Safety Training Overview • OSHA • Occupational exposures to hazardous chemicals in laboratories (1910.1450) • Hazard Communication (1910.1200) • NFPA • Fire Protection for Laboratories Using Chemicals (NFPA 45) • Personal Protective Equipment • Chemical Storage

  4. Occupational exposures to hazardous chemicals in laboratories (1910.1450) • Chemical Hygiene Plan – Required where hazardous chemicals are used in the workplace • Readily available to employees • Standard operating procedures • Implement control measures to reduce exposures • Requirement that fume hoods and other PPE are functioning properly

  5. Chemical Hygiene Plan • Provisions for employee training • Designation of personnel responsible for implementing plan and assignment of a Chemical Hygiene Officer • Procedure for removal of hazardous waste OSHA REQUIRES PLAN TO BE REVIEWED AND EVALUATED ANNUALLY

  6. Employee Training • Provide employees w/ information and training apprising them of the potential hazards in their lab • Required at the time of an employees initial assignment to a work area • Frequency of refresher training determined by employer • Location of Chemical Hygiene Plan and MSDSs or other reference material

  7. Employee Training • Measures employees can take to protect themselves • Appropriate work practices • PPE to be used • Spill Response

  8. Hazard Identification • Hazard Communication (1910.1200) • MSDSs readily available to employees • Chemical labels not removed or defaced and all containers of chemicals must be labeled as to the contents (i.e. hydrochloric acid) and hazards (i.e. corrosive)

  9. NFPA • Purpose of the standard is to provide basic requirements for the protection of life and property through prevention and control of fires and explosions involving use of chemicals in laboratories.

  10. NFPA • Flammable liquids cannot be stored on floor. NFPA 45 “Fire protection for Laboratories Using Chemicals” allows for a maximum of 5 gallons of flammable liquids (sprinklered lab) outside of a flammable storage cabinet. • Allows a maximum of 2 gallons of flammable liquids (non-sprinklered lab) outside of a flammable storage cabinet

  11. PPE • Do you know what PPE is appropriate for the work you are doing? • Gloves • Safety glasses, goggles, faceshield • Lab coat

  12. Gloves • LATEX GLOVES PROVIDE LITTLE TO NO CHEMICAL PROTECTION IN HEAVY USE CONDITIONS. • Permeation or the break through rate of latex with most solvents is only a matter of a few seconds • In 1996, a laboratory researcher (Dartmouth College) was fatally poisoned by a one time, momentary exposure to a very tiny drop of dimethylmercury onto a latex glove covered hand.

  13. Gloves • Glove Selection Guide Handout http://www.ansellpro.com/download/Ansell_7thEditionChemicalResistanceGuide.pdf

  14. Chemical Storage • ACIDS • Acetic Acid, *Chromic Acid, Hydrochloric Acid, Hydrofluoric Acid, *Nitric Acid, Phosphoric Acid, Sulfuric Acid • *Indicates strong oxidizing acids, store per oxidizers section • Storage Precautions: Store bottles on low shelf areas, or in acid cabinets. • Segregate oxidizing acids from organic acids, AND flammable materials. • Segregate acids from bases, AND from active metals such as sodium, potassium, etc. • Segregate acids from chemicals which could generate toxic gases such as sodium cyanide, iron sulfide, etc.

  15. Chemical Storage • BASES • Ammonium Hydroxide, Potassium Hydroxide, Sodium Hydroxide. • Storage Precautions: • Separate bases from acids. • Store bottles on low shelf areas, or in acid cabinets

  16. Chemical Storage • FLAMMABLES- Acetone, Benzene, Cyclohexane, Ethanol, Ethyl Acetate, Ethyl Ether, Gasoline, Hexane,, Isopropyl Alcohol, Methanol, Propanol, Tetrahydrofuran, Toluene, Xylene • Storage Precautions: • Store in approved flammable storage cabinet(s) • Separate from oxidizing acids and oxidizers. • Keep away from any source of ignition (flames, localized heat or sparks). • Use only "flammable storage" explosion proof refrigerators or freezers.

  17. Chemical Storage • OXIDIZERS-react violently with organics. • Solids- Calcium Hypochlorite, Nitrates, Peroxides –organic and inorganic • Liquids-Bromine, Hydrogen Peroxide, Nitric Acid, Perchloric Acid, Chromic Acid • Storage Precautions: • Keep away from flammables, organic solvents, and other combustible materials (i.e. paper, wood, etc.). • Store in a cool, dry place.

  18. Chemical Storage • PEROXIDE-FORMING CHEMICALS- peroxides can be explosively shock-sensitive • Ethers and acetals with alpha-hydrogen (e.g. ethyl ether, tetrahydrofuran) • 1,4-Dioxane • Storage Precautions: • Dispose before expiration dates • Label containers with receiving, opening, and disposal dates. • Store in airtight containers in a dark, cool, and dry place.

  19. Mandatory Safety Rules • Recommend posting mandatory safety rules in all labs - SEE HANDOUT

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