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NIOSH Respiratory Protective Device Information

Subject: Effective Immediately: Voluntary Rescission of six Masprot S.C., EI. LTDA Approvals

NIOSH CA 2024-1075
February 2024


The National Institute for Occupational Safety and Health (NIOSH) has honored a request by Masprot S.C., EI. LTDA to voluntarily rescind six NIOSH respirator approvals issued to Masprot S.C., EI. LTDA.

As of February 22, 2024, any respirator marked with a NIOSH approval label and approval number listed in the table below is no longer NIOSH approved. The NIOSH Certified Equipment List no longer includes these six approval numbers:

Voluntary Rescission of six Masprot S.C., EI. LTDA Approvals
Approval Number Part / Model
23C-2506 Model Supreme Half Mask M-203 w/MGV-1P
84A-7785 Model M800 Half Mask w/MGV/MHE-500
84A-7786 Model M800 Half Mask w/MGA/MHE-500 
84A-7787 Model M800 Half Mask w/MHE-500 
23C-3217 Model M800 Half Mask w/MVO-500 
23C-3218 Model M800 Half Mask w/MGV-500 

Due to the voluntary rescission of these NIOSH approvals, respirators bearing these NIOSH approval numbers may no longer be used, manufactured, assembled, sold, or distributed.

Please reach out to Masprot S.C., EI. LTDA for additional details related to their decision to voluntarily rescind six approvals issued to Masprot S.C., EI. LTDA identified in this notice. The Certified Equipment List can be used to locate other NIOSH Approved® respirators.

NIOSH Approved® is a certification mark of the U.S. Department of Health and Human Services (HHS) registered in the United States and several international jurisdictions