Acetylene tetrabromide

  • sym-Tetrabromoethane
  • 1,1,2,2-Tetrabromoethane
Formula
Br2CHCHBr2
Structure
Description
Pale-yellow liquid with a pungent odor similar to camphor or iodoform. A solid below 0 deg c.
Uses
Separating minerals by specific gravity, solvent for fats, oils, and waxes, solvent in microscopy.

Registry Numbers and Inventories.
CAS
79-27-6
EC (EINECS/ELINCS)
201-191-5
EC Index Number
602-016-00-9
EC Class
Very toxic; Irritant; Dangerous for the Environment
R 26 36 52/53
S 24 27 45 61
RTECS
KI8225000
RTECS class
Tumorigen; Mutagen; Primary Irritant
UN (DOT)
2504
Merck
12,9328
Beilstein/Gmelin
1098321
Beilstein Reference
4-01-00-00162
Swiss Giftliste 1
G-2914
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C2H2Br4
Formula mass
345.7
Melting point, °C
-1
Boiling point, °C
244
Vapor pressure, mmHg
0.05 (25 C)
Vapor density (air=1)
11.9
Saturation Concentration
26 ppm at 20 C (calculated)
Density
2.9656 g/cm3 (20 C)
Solubility in water
650 mg/L
Surface tension
47.1 g/s2 (30 C)
Refractive index
1.63263 (20 C)
Partition coefficient, pKow
3.67
Heat of vaporization
46.1 kJ/mol

Hazards and Protection.
Storage
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Keep away from metals.
Handling
Wash thoroughly after handling. Use with adequate ventilation. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Provide ventilation.
Stability
Stable under normal shipping and handling conditions.
Incompatibilities
Strong oxidizers, strong bases, and metals such as aluminum, magnesium, and zinc in the presence of steam. Will attack some forms of plastics, rubber,and coatings.
Decomposition
Irritating and toxic fumes and gases, hydrogen bromide, bromine fumes, carbonyl bromide.

Fire.
Flash Point,°C
97
Autoignition, °C
335
Upper exp. limit, %
24.5
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Runoff from fire control or dilution water may cause pollution. Extinguishing media: Substance is noncombustible; use agent most appropriate to extinguish surrounding fire.
Fire potential
May burn but does not ignite readily.
Hazards
Containers may explode when heated.
Combustion products
When heated, it emits highly toxic fumes of carbonyl bromide.
Health
3
 
Flammability
0
 
 
Reactivity
1
 

Health.
Exposure limit(s)
OSHA PEL: TWA 1 ppm (14 mg/m3) NIOSH REL: See Appendix D NIOSH IDLH: 8 ppm
Poison_Class
2
Exposure effects
   Ingestion
Causes gastrointestinal irritation with nausea, vomiting and diarrhea. May cause liver and kidney damage.
   Inhalation
Causes respiratory tract irritation. May cause liver and kidney damage. May cause lung damage. May cause headache, loss of appetite, nausea, fatigue, abdominal pain, darkened urine and jaundice..
   Skin
May be absorbed through damaged or abraded skin in harmful amounts. Exposure may cause irritation and possible burns. Causes symptoms similar to those of inhalation.
   Eyes
Contact with eyes may cause severe irritation, and possible eye burns.

First aid
 
   Ingestion
Induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
   Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
2504
Response guide
Hazard class
6.1
Packing Group
III
 
HS Code
2903 30 36