CFR > Title 42 - Public Health > CHAPTER I—PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES > SUBCHAPTER G—OCCUPATIONAL SAFETY AND HEALTH RESEARCH AND RELATED ACTIVITIES (parts 80 to 87) > PART 84—APPROVAL OF RESPIRATORY PROTECTIVE DEVICES > SUBPART F—Classification of Approved Respirators; Scope of Approval; Atmospheric Hazards; Service Time (§84.50 to §84.53) > 84.52—Respiratory hazards; classification.

84.52—Respiratory hazards; classification.

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.