lab safety training
TRANSCRIPT
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
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
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
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
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
EMPLOYEE TRAINING Measures employees can take to protect
themselves Appropriate work practices PPE to be used Spill Response
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)
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
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.
GLOVES Glove Selection Guide Handout
http://www.ansellpro.com/download/Ansell_7thEditionChemicalResistanceGuide.pdf
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.
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
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.
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.
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.
MANDATORY SAFETY RULES Recommend posting mandatory safety rules
in all labs - SEE HANDOUT