Bitter taste fit test solution for fit testing Used with the 3M™ Qualitative Fit Test Apparatus FT-30 Can be used to check face-to-respirator seal on any particulate respirator or gas/vapor respirator with a particulate prefilter For Occupational Use Only Meet the performance criteria for fit testing respirators under the current OSHA Standard for Respirator Protection: 29 CFR 1910.134, Appendix A.