Pesticide labels often specify the type of respirator to be used by its TC designation.

The TC designation is assigned by the National Institute for Occupational Safety and Health (NIOSH) to classify respirators. TC-23 designates chemical cartridge respirators, which are used to protect against specific gases and vapors, as specified on pesticide labels for Category7A applications. TheGeneral Pest Management: Guide for Commercial Applicators - Category 7A(Chapter 3: Pesticide Safety) notes that TC-23 respirators are commonly required for pesticide applications involving volatile chemicals. Option A (TC-84) refers to particulate respirators (e.g., N95 masks). Option C (TC-19) is not a valid designation for pesticide use.