[Code of Federal Regulations]
[Title 42, Volume 1]
[Revised as of October 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 42CFR84.79]

[Page 521]
 
                         TITLE 42--PUBLIC HEALTH
 
    CHAPTER I--PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN 
                                SERVICES
 
PART 84_APPROVAL OF RESPIRATORY PROTECTIVE DEVICES--Table of Contents
 
              Subpart H_Self-Contained Breathing Apparatus
 
Sec. 84.79  Breathing gas; minimum requirements.

    (a) Breathing gas used to supply apparatus shall be respirable and 
contain no less than 19.5 (dry atmosphere) volume percent of oxygen.
    (b) Oxygen, including liquid oxygen, shall contain not less than 
99.0 percent, by volume, of pure O2, not more than 0.03%, by 
volume, carbon dioxide, and not more than 0.001%, by volume, carbon 
monoxide. Methods for making these determinations can be found in the 
U.S. Pharmacopeia National Formulary. Containers used for oxygen must 
not be treated with any toxic, sleep-inducing, narcosis-producing, or 
respiratory tract irritating compounds.
    (c) Compressed, gaseous breathing air shall meet the applicable 
minimum grade requirements for Type I gaseous air set forth in the 
Compressed Gas Association Commodity Specification for Air, G-7.1, 1966 
(Grade D or higher quality). G-7.1 is incorporated by reference and has 
been approved by the Director of the Federal Register in accordance with 
5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from American 
National Standards Institute, Inc., 1430 Broadway, New York, NY 10018. 
Copies may be inspected at the NIOSH, Certification and Quality 
Assurance Branch, 1095 Willowdale Road, Morgantown, WV 26505-2888, or at 
the National Archives and Records Administration (NARA). For information 
on the availability of this material at NARA, call 202-741-6030, or go 
to: http://www.archives.gov/federal--register/code--of--federal--
regulations/ibr--locations.html.
    (d) Compressed, liquefied breathing air shall meet the applicable 
minimum grade requirements for Type II liquid air set forth in the 
Compressed Gas Association Commodity Specification for Air, G-7.1, 1966 
(Grade B or higher quality). G-7.1 is incorporated by reference and has 
been approved by the Director of the Federal Register in accordance with 
5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from American 
National Standards Institute, Inc., 1430 Broadway, New York, NY 10018. 
Copies may be inspected at the NIOSH, Certification and Quality 
Assurance Branch, 1095 Willowdale Road, Morgantown, WV 26505-2888, or at 
the National Archives and Records Administration (NARA). For information 
on the availability of this material at NARA, call 202-741-6030, or go 
to: http://www.archives.gov/federal--register/code--of--federal--
regulations/ibr--locations.html.