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NIOSH Respiratory Protective Device Information										Related Pages
										**Subject:** Effective Immediately: Voluntary Rescission of RB Sigma, LLC ApprovalNIOSH CA 2023-1051
March 2023
SUMMARY
The National Institute for Occupational Safety and Health (NIOSH) has honored a request by RB Sigma, LLC to **voluntarily rescind** **the NIOSH respirator approval issued to****RB Sigma, LLC**
As of February 15, 2023, **any respirator marked with a NIOSH approval label with approval number TC-84A-9419 is no longer NIOSH approved. The NIOSH****Certified Equipment List** **no longer includes this approval number.**
Due to the voluntary rescission of this NIOSH approval, **respirators bearing this NIOSH approval number may no longer be used, manufactured, assembled, sold, or distributed.**
Please reach out to RB Sigma, LLC for additional details related to their decision to voluntarily rescind the approval issued to RB Sigma, LLC identified in this notice. The **Certified Equipment List** can be used to locate other NIOSH Approved® respirators.Effective Immediately: Voluntary Rescission of RB Sigma, LLC Approval [PDF – 175 KB]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.
							
					
							Last Reviewed:  March 1, 2023						Source: 	National Institute for Occupational Safety and Health
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