Tetrabromoethane

1,1,2,2-Tetrabromoethane, or simply tetrabromoethane (TBE), is a halogenated hydrocarbon, chemical formula C2H2Br4. Although three bromine atoms may bind to one of the carbon atoms creating 1,1,1,2-tetrabromoethane this is not thermodynamically favorable, so in practice tetrabromoethane is equal to 1,1,2,2-tetrabromoethane, where each carbon atom binds two bromine atoms.

Tetrabromoethane
Names
Preferred IUPAC name
1,1,2,2-Tetrabromoethane
Other names
  • Acetylene tetrabromide
  • Muthmann's liquid
  • Tetrabromoacetylene
  • Symmetrical tetrabromoethane
Identifiers
3D model (JSmol)
Abbreviations TBE
1098321
ChemSpider
ECHA InfoCard 100.001.083
EC Number
  • 201-191-5
MeSH 1,1,2,2-tetrabromoethane
RTECS number
  • KI8225000
UNII
UN number 2504
  • InChI=1S/C2H2Br4/c3-1(4)2(5)6/h1-2H N
    Key: QXSZNDIIPUOQMB-UHFFFAOYSA-N N
  • BrC(Br)C(Br)Br
Properties
C2H2Br4
Molar mass 345.654 g·mol−1
Appearance Colourless liquid
Density 2.967 g mL−1
Melting point −1.0 °C; 30.3 °F; 272.2 K
Boiling point 243.6 °C; 470.4 °F; 516.7 K
630 mg L−1 (at 20 °C)
Vapor pressure 10 Pa (at 20 °C)
-123.4·10−6 cm3/mol
1.637
Thermochemistry
165.7 J K−1 mol−1
Hazards
GHS labelling:
Danger
H319, H330, H412
P260, P273, P284, P305+P351+P338, P310
NFPA 704 (fire diamond)
3
1
1
Flash point 97 °C (207 °F; 370 K)
335 °C (635 °F; 608 K)
Lethal dose or concentration (LD, LC):
  • 1.2 g kg−1 (oral, rat)
  • 5.25 g kg−1 (dermal, rat)
  • 0.4 g/kg (oral, guinea pig)
  • 0.4 g/kg (oral, rabbit)
  • 0.269 g/kg (oral, mouse)
38 ppm (rat, 4 hr)
NIOSH (US health exposure limits):
PEL (Permissible)
 TWA 1 ppm (14 mg/m3)
REL (Recommended)
 None established
IDLH (Immediate danger)
 8 ppm
Safety data sheet (SDS) hells-confetti.com
Related compounds
Related alkanes
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references
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