---
kind: "unit"
title: "42"
title_heading: "Public Health"
key: "chI/subchG/part84"
level: "part"
label: "Part 84"
heading: "Approval of Respiratory Protective Devices"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/42/chI-subchG-part84"
sections_count: 169
---

# Part 84 — Approval of Respiratory Protective Devices

Title 42 C.F.R. — Public Health › Chapter I — Public Health Service, Department of Health and Human Services › Subchapter G — Occupational Safety and Health Research and Related Activities

## Contents

- [Subpart A — General Provisions](/cfr/42/chI-subchG-part84-subpartA.md)
- [Subpart B — Application for Approval](/cfr/42/chI-subchG-part84-subpartB.md)
- [Subpart C — Fees](/cfr/42/chI-subchG-part84-subpartC.md)
- [Subpart D — Approval and Disapproval](/cfr/42/chI-subchG-part84-subpartD.md)
- [Subpart E — Quality Control](/cfr/42/chI-subchG-part84-subpartE.md)
- [Subpart F — Classification of Approved Respirators; Scope of Approval; Atmospheric Hazards; Service Time](/cfr/42/chI-subchG-part84-subpartF.md)
- [Subpart G — General Construction and Performance Requirements](/cfr/42/chI-subchG-part84-subpartG.md)
- [Subpart H — Self-Contained Breathing Apparatus](/cfr/42/chI-subchG-part84-subpartH.md)
- [Subpart I — Gas Masks](/cfr/42/chI-subchG-part84-subpartI.md)
- [Subpart J — Supplied-Air Respirators](/cfr/42/chI-subchG-part84-subpartJ.md)
- [Subpart K — Air-Purifying Particulate Respirators](/cfr/42/chI-subchG-part84-subpartK.md)
- [Subpart L — Chemical Cartridge Respirators](/cfr/42/chI-subchG-part84-subpartL.md)
- [Subpart M — Subpart M [Reserved]](/cfr/42/chI-subchG-part84-subpartM.md)
- [Subpart N — Special Use Respirators](/cfr/42/chI-subchG-part84-subpartN.md)
- [Subpart O — Closed-Circuit Escape Respirators](/cfr/42/chI-subchG-part84-subpartO.md)
- [Subpart P-JJ — Subparts P-JJ [Reserved]](/cfr/42/chI-subchG-part84-subpartP-JJ.md)