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Health and safety Stuff. A Couple of Definitions. Health and Safety Stuff: Your Right (and need) to Know. MSDS: Material Safety Data Sheet The Material Safety Data Sheet (MSDS) is a summary of the important health related facts about a chemical used in our work or home environment.

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Health and safety Stuff


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health and safety stuff

Health and safety Stuff

A Couple of Definitions

health and safety stuff your right and need to know
Health and Safety Stuff: Your Right (and need) to Know
  • MSDS: Material Safety Data Sheet
    • The Material Safety Data Sheet (MSDS) is a summary of the important health related facts about a chemical used in our work or home environment.
    • The purpose of the MSDS is
      • “to inform industrial purchasers and users of hazardous chemicals of the reasonably foreseeable physical and chemical hazards that may arise from the use of those chemicals.”
    • Most products we use in our day to day work and lives have MSDS
    • There is a generally accepted format for MSDS’s --- BUT THEY ARE NOT ALL THE SAME.
health and safety stuff your right and need to know3
Health and Safety Stuff: Your Right (and need) to Know

TLV:Threshold Limit Value

  • TLV is the concentration of material to which a person can be exposed Day after Day without adverse effects
  • There three Kinds of TLV’s
    • TLV – TWA: TWA=Time weighted Average --- for example an average over a 40 hour work week or over an 8 hour day
    • TLV-STEL: The max concentration for 15 min exposures at most 4 times a day with at least 1 hour between exposures
    • TLV-C: Ceiling Limit – NEVER EXCEED THIS LIMIT EVEN INSTANTANEOUSLY>
health and safety stuff your right and need to know4
Health and Safety Stuff: Your Right (and need) to Know
  • Immediately Dangerous to Life and Health (IDLH)
    • “An atmosphere that poses immediate threat to life, would cause irreversible adverse health effects or would impair an individual’s ability to escape from a dangerous atmosphere.”