3M Sensitivity Solution can be used to check face-to-respirator seal on any particulate respirator or gas/vapor respirator with a particulate prefilter. It is a bitter taste sensitivity solution for fit testing and is Used with the 3M Qualitative Fit Test Apparatus FT-30. It is designed to help your organization meet CSA Z94.4 respiratory standard and US OSHA fit testing requirements for respirators. The product is for occupational use only.