OXYGEN | Occupational Safety and Health Administration

OXYGEN

Chemical Identification
Chemical Identification
CAS #	7782-44-7
Formula	O₂
Synonyms

Physical Properties
Physical Properties
Physical description	Colorless, odorless and tasteless gas.
Boiling point	-297.3°F	Molecular weight	32
Freezing point/melting point	-361°F	Vapor pressure
Flash point		Vapor density
Specific gravity	1.14 at -297.4°F	Ionization potential
Lower explosive limit (LEL)		Upper explosive limit (UEL)
NFPA health rating		NFPA fire rating
NFPA reactivity rating		NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Monitoring Methods Used by OSHA
Analyte code (IMIS no.)
Sampling group
Sampler/Sampling media
Sampling time^*
Sampling volume (TWA)^*
Sampling flow rate (TWA)^*
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments
Method reference
Notes
Special requirements

^* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Wipe Method
Wipe Method
Sampler/Sampling media

Bulk Method
Bulk Method

On-Site Screening Techniques
On-Site Screening Techniques
Device	Detector tube	Detector tube	Detector tube	Detector tube	Detector tube	CMS Chip
Model/Type	Dräger - Oxygen 5%/B, 6728081	Dräger - Oxygen 5%/C, 8103261	Gastec 31B	Matheson-Kitagawa 8014-159SA	Matheson-Kitagawa 8014-159SB, 8014-159SC	Oxygen, 1-30 Vol% range
Sampling information (see manufacturer instructions)	1 stroke, approx 2%-23% range, uncertainty approx 16%	1 stroke, approx 2-23% range, uncertainty approx 16%	0.5 or 1 stroke, 2-24% range, uncertainty 6-24%	0.5 stroke, approx 2-24% range	8014-159SB: 0.5 stroke, approx 2-24% range. 8014-159SC: 0.5 or 1 stroke, approx 1-24% range

Exposure Limits
Exposure Limits
OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak		NIOSH REL Up to 10-hour TWA (ST) STEL (C) Ceiling		ACGIH TLV© 8-hour TWA (ST) STEL (C) Ceiling		CAL/OSHA PEL 8-hour TWA (ST) STEL (C) Ceiling Peak
PEL-TWA		REL-TWA		TLV-TWA		PEL-TWA
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C		TLV-C		PEL-C
Skin notation	NA	Skin notation	NA	Skin notation	NA	Skin notation	NA
Notes: Not established		Notes: Not established		Notes: Not established		Notes: Not established
Health factors: See NIH-NLM PubChem.		IDLH
Carcinogenic classifications:		Notes:

AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References
Additional Resources and Literature References
NOAA: CAMEO Chemicals - Oxygen NIOSH: Pocket Guide to Chemical Hazards - Oxygen Literature References Pohanish, R.P. (editor): Oxygen. In, Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 2. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp. 1771-1772.

Last Updated Date : 01/07/2021