Formaldehyde protection using approved chin-style respirator canisters

February 26, 1988

Mr. Earle Ganzenmuller
Product Manager
Air-Purifying Products
Scott Aviation
[Recipient address omitted]
Dear Mr. Ganzenmuller:

This is in response to your recent letter concerning respirator canisters for protection against formaldehyde.

You indicated in your letter that the Occupational Safety and Health Administration (OSHA) standard on formaldehyde, 29CFR 1910.1048, does not permit the use of chin style canisters in the respirator selection table, and the test data which accompanied you letter demonstrated that these canisters are at least as effective as the larger size canisters permitted in the OSHA formaldehyde standard.

After reviewing the data you sent to us and after consulting with Health Standards Programs of OSHA, and the Testing and Certification Branch (TCB) of the National Institute for Occupational Safety and Health (NIOSH), we found that the approved Scott "formaldehyde" chin-style canisters would be acceptable for protection against formaldehyde at concentrations up to 100 parts per million (ppm) for up to 2 hours and at concentrations up to 10 ppm for up to 4 hours as well as for emergency escape.

The NIOSH approval label was based on the former formaldehyde standard of 3 ppm. since the Standard has been lowered to 1 ppm, we will contact NIOSH to change the approval label.

Please contact us if you need additional assistance.

Sincerely,
Edward Baier
Director
Directorate of Technical Support