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  • A Quick Guide to Air-Purifying Respirators
    for facepiece, filter and chemical cartridges and powered vs. non-powered versions.
  • Collecting and Testing Dust: Knowing Dust Characteristics Facilitates Ventilation Equipment Selection
    In 1998, both the Occupational Safety and Health Administration (OSHA) and the National Institute for Occupational Safety and Health (NIOSH) issued more stringent requirements relating to the use of respirators in plants. Though respirators are critical to shielding workers from ambient dust
  • Control of Isoflurane Vapor in the Workplace: Industrial Hygiene Report (.pdf)
     and is a volatile, non‐. flammable liquid (b.p. 48.5o C or 119.3 o F).  Its chemical name is (2‐chloro‐2‐. (difluromethoxy)‐1,1,1,‐trifluro ethane.  It is relatively non‐toxic and is always . used together with air or oxygen, and sometimes with nitrous oxide gas.  There is . no established PEL
    . 0.19. 0.0049. Carbon tetrachloride,. perchloroethylene. Lower boiling solvents weighted more heavily when determining coefficients. *Nelson, G.O. and A.N. Correia "Respirator Cartridge Efficiency Studies: VIII. Summary and. Conclusions ", UCRL Preprint 77654 (Livermore, California, University

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