HYDROGEN BROMIDE | Occupational Safety and Health Administration

HYDROGEN BROMIDE†

Chemical Identification
CAS #	10035-10-6
Formula	HBr
Synonyms	anhydrous hydrogen bromide; aqueous hydrogen bromide (hydrobromic acid)

Physical Properties
Physical description	Colorless gas with a sharp, irritating odor.
Boiling point	-88.2°F	Molecular weight	80.92
Freezing point/melting point	-124°F	Vapor pressure	20 atm
Flash point		Vapor density	2.81
Specific gravity	2.14 at -88.6°F	Ionization potential	11.62 eV
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
Analyte code (IMIS no.)	1420
Sampling group
Sampler/Sampling media	ORBO™ 53 activated silica gel tube [Supelco 20265]
Sampling time^*
Sampling volume (TWA)^*	96 L
Sampling flow rate (TWA)^*	0.2 L/min
Sampling volume (STEL/Peak/C)^*	2.5 L
Sampling flow rate (STEL/Peak/C)^*	0.5 L/min
Analytical method instruments	IC
Method reference	OSHA ID-165SG (partially validated)
Notes	Submit as a separate sample, however, hydrogen chloride can be analyzed from the same sample. The sample is analyzed for bromide (or chloride, if requested) and the result reported as the acid. Make sure that the glass fiber filter plug is firmly in contact with the silica gel before and after sampling. Report the presence of bromide (or chloride) salts to the analytical laboratory.
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.

Bulk/Wipe Method
Wipe Sampler/Sampling media
Bulk Method

On-Site Screening Techniques
Device	Detector tube
Model/Type	Gastec 15L
Sampling information (see manufacturer instructions)	0.5-10 strokes, 0.04-16 ppm range, uncertainty 25% for 0.8-4 ppm, 16% for 4-16 ppm

**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	3 ppm (10 mg/m³)	REL-TWA		TLV-TWA		PEL-TWA
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C	3 ppm (10 mg/m³)	TLV-C	2 ppm [2001]	PEL-C	3 ppm (10 mg/m³)
Skin notation	N	Skin notation	N	Skin notation	N	Skin notation	N
Notes: See 29 CFR 1910.1000 Table Z-1.		Notes:		Notes:		Notes:
Health factors: See NIH-NLM PubChem.		IDLH	30 ppm
Carcinogenic classifications: Not listed		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Hydrogen bromide, anhydrous

NIOSH: Pocket Guide to Chemical Hazards - Hydrogen bromide

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Hydrogen bromide. See annual publication for most recent information.
Burns, M.J. and Linden, C.H.: Another hot tub hazard: toxicity secondary to bromine and hydrobromic acid exposure. Chest 111(3): 816-819, 1997.
Kraut, A. and Lilis, R.: Chemical pneumonitis due to exposure to bromine compounds. Chest 94(1): 208-210, 1988.
Orlando, J.P., de Haro, L., Jouglard, J. and Leroyer, S.: Reactive airway dysfunction syndrome and bronchiolitis obliterans after exposure to acid vapors [French]. Rev. Pneumol. Clin. 53(6): 339-342, 1997.
Pohanish, R.P. (editor): Hydrogen Bromide. In, Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 1. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp. 1274-1276.

Last Updated Date : 12/31/2020

HYDROGEN BROMIDE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References