Hexachlorobutadiene

  • Hexachloro-1,3-butadiene
  • Perchlorobutadiene
  • Hexachlorobuta-1,3-diene
Formula
Cl2C=CCl=CCl=CCl2
Structure
Description
A colorless liquid with a mild odor.
Uses
Solvent for elastomers, heat-transfer liq, transformer and hydraulic fluid, wash liquor for removing c4 and higher hydrocarbons, fungicide.

Registry Numbers and Inventories.
CAS
87-68-3
EC (EINECS/ELINCS)
201-765-5
R 23/24/25 40
S 36/37/39 45
RTECS
EJ0700000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Mutagen; Reproductive Effector; Primary Irritant
UN (DOT)
2279
Merck
13,4697
Beilstein/Gmelin
1766570
Beilstein Reference
4-01-00-00988
RCRA
U128
Swiss Giftliste 1
G-1679
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C4Cl6
Formula mass
260.76
Melting point, °C
-21
Boiling point, °C
210
Vapor pressure, mmHg
0.1 (25 C)
Vapor density (air=1)
8.99
Odor Threshold Odor threshold 12 mg/m3
Critical temperature
157-172
Critical pressure
28
Density
1.6825 g/cm3 (20 C)
Solubility in water
Insoluble
Viscosity
2.45 cp (38 C)
Surface tension
35.5 g/s2 (30 C)
Refractive index
1.556 (20 C)
Partition coefficient, pKow
4.78
Heat of vaporization
44.8 kJ/mol

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Attempt to stop leak if without undue personnel hazard. Use water spray to knock-down vapors.
Stability
No data.
Incompatibilities
Can react vigorously with oxidizing materials Reacts to form an explosive product with bromine perchlorate.
Decomposition
When heated to decomposition it emits very toxic fumes of chlorine cl-.

Fire.
Flash Point,°C
92
Autoignition, °C
610
Upper exp. limit, %
15.7
Fire fighting
Do not extinguish fire unless flow can be stopped. Use water in flooding quantities as fog. Solid streams of water may be ineffective. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. Use alcohol foam, dry chemical or carbon dioxide.
Fire potential
Nonflammable.
Combustion products
They contain highly toxic and irritating chloride fumes.
Health
3
 
Flammability
1
 
 
Reactivity
0
 

Health.
Exposure limit(s)
TLV (as TWA): 0.02 ppm; 0.21 mg/m3 A3 (skin) (ACGIH 1997). NIOSH REL: Ca TWA 0.02 ppm (0.24 mg/m3) skin See Appendix A NIOSH IDLH: Potential occupational carcinogen
Poison_Class
3
Exposure effects
Abnormally low blood pressure has been reported. Nervous function disorders and CNS depression may occur. Soft tissue anomalies and central nervous system developmental abnormalities have occurred in experimental animals. <br>Post-implantation mortality and fetotoxicity have been reported in experimental animals. <br>No data were available to assess the potential effects of exposure to this agent during lactation.
   Inhalation
Dyspnea, chronic bronchitis, and congestion and hemorrhage in the lungs may occur.
   Skin
Hemorrhagic and necrotic skin lesions may occur.
   Eyes
See Inhalation.

First aid
 
   Ingestion
DO NOT INDUCE VOMITING. Corrosive chemicals will destroy the membranes of the mouth, throat, and esophagus and, in addition, have a high risk of being aspirated into the victim's lungs during vomiting which increases the medical problems. If the victim is conscious and not convulsing, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. IMMEDIATELY transport the victim to a hospital. If the victim is convulsing or unconscious, do not give anything by mouth, ensure that the victim's airway is open and lay the victim on his/her side with the head lower than the body. DO NOT INDUCE VOMITING. Transport the victim IMMEDIATELY to a hospital.
   Inhalation
IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. IMMEDIATELY call a physician and be prepared to transport the victim to a hospital even if no symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used.
   Skin
IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. IMMEDIATELY call a hospital or poison control center even if no symptoms (such as redness or irritation) develop. IMMEDIATELY transport the victim to a hospital for treatment after washing the affected areas.
   Eyes
First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.

Transport.
UN number
2279
Response guide
Hazard class
6.1
Packing Group
III
 
USCG CHRIS Code
HCB
 
Std. Transport #
4925116