42 C.F.R. § 84.52 Respiratory hazards; classification.
Title 42 - Public Health
Respirators described in subparts H through L of this part shall be classified as approved for use against any or all of the following respiratory hazards: (a) Oxygen deficiency; (b) Gases and vapors; and (c) Particles, including dusts, fumes and mists.
Title 42: Public Health
PART 84—APPROVAL OF RESPIRATORY PROTECTIVE DEVICES
Subpart F—Classification of Approved Respirators; Scope of Approval; Atmospheric Hazards; Service Time
§ 84.52 Respiratory hazards; classification.

