ACETYLENE TETRABROMIDE (1,1,2,2-TETRABROMOETHANE)

Chemical Identification
CAS #	79-27-6
Formula	C₂H₂Br₄
Synonyms	symmetrical tetrabromoethane; TBE; tetrabromoacetylene; tetrabromoethane; 1,1,2,2-tetrabromoethane

Physical Properties
Physical description	Pale-yellow liquid with a pungent odor similar to camphor or iodoform.
Boiling point	474°F (decomposes)	Molecular weight	345.7
Freezing point/melting point	32°F	Vapor pressure	0.02 mmHg
Flash point		Vapor density
Specific gravity	2.97	Ionization potential
Lower explosive limit (LEL)		Upper explosive limit (UEL)
NFPA health rating	3	NFPA fire rating	0
NFPA reactivity rating	1	NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.)	0080
Sampling group
Sampler/Sampling media	Silica gel tube (150/75 mg) [SKC 226-10]
Sampling time^*
Sampling volume (TWA)^*	50-100 L
Sampling flow rate (TWA)^*	0.2-1 L/min
Sampling volume (STEL/Peak/C)^*
Sampling flow rate (STEL/Peak/C)^*
Analytical method instruments	GC-FID
Method reference	NIOSH 2003 (partially validated)
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.

Bulk/Wipe Method
Wipe Sampler/Sampling media
Bulk Method

On-Site Screening Techniques
Device
Model/Type
Sampling information (see manufacturer instructions)

**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	1 ppm (14 mg/m³)	REL-TWA		TLV-TWA		PEL-TWA	1 ppm (14 mg/m³)
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C		TLV-C		PEL-C
Skin notation	N	Skin notation	N	Skin notation	N	Skin notation	N
Notes: See 29 CFR 1910.1000 Table Z-1.		Notes: See Appendix D - Substances With No Established RELs.		Notes: Visit the ACGIH TLV site for specific data		Notes:
Health factors: See NIH-NLM PubChem.		IDLH	8 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 - Acetylene tetrabromide

NIOSH: Pocket Guide to Chemical Hazards - Acetylene tetrabromide

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - 1,1,2,2-Tetrabromoethane. See annual publication for most recent information.
Reid, J.B.: Saturated methyl halogenated aliphatic hydrocarbons (Chapter 62). In: Patty's Toxicology, 5^th Ed., Vol. 5, Bingham, E., Cohrssen, B., Powell, C.H. eds. New York: John Wiley & Sons, Inc., pp. 185-189, 2001.
Morrow, L.A., Callender, T., Lottenberg, S., Buchsbaum, M.S., Hodgson, M.J., and Robin, N.: PET and neurobehavioral evidence of tetrabromoethane encephalopathy. J. Neuropsychiatry Clin. Neurosci. 2(4) : 431-435, 1990.
Van Duuren, B.L., Goldschmidt, B.M., Loewengart, G., Smith, A.C., Melchionne, S., Seldman, I. and Roth, D.: Carcinogenicity of halogenated olefinic and aliphatic hydrocarbons in mice. J. Natl. Cancer Inst. 63(6): 1433-1439, 1979.

Last Updated Date : 03/25/2024

ACETYLENE TETRABROMIDE (1,1,2,2-TETRABROMOETHANE)

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References