April 29, 2020

OSHA issues guidance on reuse, decontamination of N95 respirators

By: Judy Mathias

Editor's Note

The Occupational Safety and Health Administration (OSHA) on April 24 issued interim guidance on the reuse and decontamination of N95 and other filtering-facepiece respirators during the COVID-19 pandemic.

OSHA notes that the National Institute for Occupational Safety and Health (NIOSH) has identified research that suggests the following methods for decontamination can be used:

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  • vaporous hydrogen peroxide
  • ultraviolet germicidal irradiation
  • moist heat (eg, water heated in an oven)
  • microwave-generated steam
  • liquid hydrogen peroxide.

Based on NIOSH-evaluated research, the following methods should not be used unless data becomes available that demonstrate their safety and effectiveness:

  • autoclaving
  • dry heat
  • isopropyl alcohol
  • soap
  • dry microwave irradiation
  • chlorine bleach
  • disinfectant wipes
  • ethylene oxide.

NIOSH notes that only respirator manufacturers can reliably provide guidance on how to decontaminate their specific models. In the absence of manufacturers’ recommendations, third parties (eg, respiratory protection or other industrial hygiene consultants) may provide guidance or procedures on how to decontaminate respirators without impacting performance.


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