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Acetylene tetrabromide																				Related Pages
Synonyms & Trade Names
			Symmetrical tetrabromoethane, TBE, Tetrabromoacetylene, 1,1,2,2-Tetrabromoethane, Tetrabromoethane
CAS No.
			79-27-6
	RTECS No.
			KI8225000
	DOT ID & Guide
			2504 159

FormulaCHBr2CHBr2
	Conversion
			1 ppm = 14.14 mg/m3
	IDLH
			8 ppmSee: 79276

Exposure Limits
			NIOSH RELSee Appendix D
					OSHA PEL TWA 1 ppm (14 mg/m3)
	Measurement Methods
			**NIOSH** 2003
					
					See: NMAM or OSHA Methods
										
Physical Description
			Pale-yellow liquid with a pungent odor similar to camphor or iodoform.
					[Note: A solid below 32°F.]													
										
Molecular Weight345.7	
	Boiling Point474°F (Decomposes)
	Freezing Point32°F
	Solubility0.07%
	Vapor Pressure0.02 mmHg
	Ionization Potential?											
Specific Gravity2.97	
	Flash PointNA
	Upper Explosive LimitNA
	Lower Explosive LimitNA
Noncombustible Liquid
Incompatibilities & Reactivities
			Strong caustics; hot iron; reducing metals such as aluminum, magnesium & zinc
Exposure Routes
			inhalation, ingestion, skin and/or eye contact
Symptoms
			irritation eyes, nose; anorexia, nausea; headache; abdominal pain; jaundice; leukocytosis (increased blood leukocytes); central nervous system depression
Target Organs
			Eyes, respiratory system, liver, central nervous system
										
Personal Protection/Sanitation
			(See protection codes) **Skin:**Prevent skin contact
							**Eyes:**Prevent eye contact
							**Wash skin:**When contaminated
							**Remove:**When wet or contaminated
							**Change:**No recommendation
	First Aid
			(See procedures)**Eye:**Irrigate immediately
							**Skin:**Water flush promptly
							**Breathing:**Respiratory support
							**Swallow:**Medical attention immediately
Respirator Recommendations
			**OSHA****Up to 8 ppm**: (APF = 10) Any supplied-air respirator(APF = 50) Any self-contained breathing apparatus with a full facepiece**Emergency or planned entry into unknown concentrations or IDLH conditions:** (APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus**Escape:** (APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canisterAny appropriate escape-type, self-contained breathing apparatus
				Important additional information about respirator selection
See also
			INTRODUCTION
					  ICSC CARD: 1235
					  MEDICAL TESTS: 0005

			
							

			Page last reviewed:  October 30, 2019						Content
							source: 	National Institute for Occupational Safety and Health NIOSH Pocket Guide to Chemical Hazards
Introduction
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Appendices
A – NIOSH Potential Occupational Carcinogens
B – Thirteen OSHA-Regulated Carcinogens
C – Supplementary Exposure Limits
D – Substances with No Established RELs
E – OSHA Respirator Requirements for Selected Chemicals
F – Miscellaneous Notes
G – 1989 Air Contaminants Update Project: Exposure Limits NOT in Effect
Type C & CE – Definitions for Type C and Type CE Respirators
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