L AB S AFETY

W HY L AB S AFETY ? Protect yourself from laboratory hazards Protect students and others from laboratory hazards Comply with State and Federal regulations Set a good example for students

L ABORATORY S AFETY T RAINING O VERVIEW OSHA Occupational exposures to hazardous chemicals in laboratories ( ) Hazard Communication ( ) NFPA Fire Protection for Laboratories Using Chemicals (NFPA 45) Personal Protective Equipment Chemical Storage

O CCUPATIONAL EXPOSURES TO HAZARDOUS CHEMICALS IN LABORATORIES ( ) 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

C HEMICAL H YGIENE P LAN 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

E MPLOYEE T RAINING 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

E MPLOYEE T RAINING Measures employees can take to protect themselves Appropriate work practices PPE to be used Spill Response

H AZARD I DENTIFICATION Hazard Communication ( ) 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)

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.

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

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

G LOVES 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.

G LOVES Glove Selection Guide Handout _7thEditionChemicalResistanceGuide.pdf

C HEMICAL S TORAGE 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.

C HEMICAL S TORAGE BASES Ammonium Hydroxide, Potassium Hydroxide, Sodium Hydroxide. Storage Precautions: Separate bases from acids. Store bottles on low shelf areas, or in acid cabinets

C HEMICAL S TORAGE 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.

C HEMICAL S TORAGE 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.

C HEMICAL S TORAGE 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.

M ANDATORY S AFETY R ULES Recommend posting mandatory safety rules in all labs - SEE HANDOUTHANDOUT