1,3-Butadiene

  • Vinylethylene
  • Buta-1,3-diene
  • Divinyl
  • Biethylene
  • Bivinyl
  • Erythrene
Formula
CH2=CHCH=CH2
Structure
Description
Colorless gas. Mildly aromatic odor.
Uses
Monomer used for the production of polymers such as synthetic rubber, plastics, and resins.

Registry Numbers and Inventories.
CAS
106-99-0
EC (EINECS/ELINCS)
203-450-8
EC Index Number
601-013-00-X
EC Class
Extremely flammable; Carcinogenic Category 1; Mutagenic Category 2
R 12 45 46
RTECS
EI9275000
RTECS class
Tumorigen; Mutagen; Reproductive Effector; Human Data
UN (DOT)
1010
Merck
13,1498
Beilstein/Gmelin
605258
Beilstein Reference
4-01-00-00976
Swiss Giftliste 1
G-1313
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C4H6
Formula mass
54.09
Melting point, °C
-108.9
Boiling point, °C
-4.4
Vapor pressure, mmHg
1840 (20 C)
Vapor density (air=1)
1.87
Odor Threshold Odor threshold 4 mg/m3
Critical temperature
161.8
Critical pressure
42.7
Density
0.6218 g/cm3 (20 C)
Solubility in water
Insoluble
Viscosity
0.00754 cp at 20C, gas
Surface tension
13.4 g/s2 at 20 C
Refractive index
1.4223 (20 C)
Dipole moment
0 D
Dielectric constant
2.05 (-8 C)
Partition coefficient, pKow
1.99
Thermal expansion
0.0019/K at 20 C
Heat of fusion
8.0 kJ/mol
Heat of vaporization
21.2 kJ/mol
Heat of combustion
-2545 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.
A B1 D2A F
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. Always wear thermal protective clothing when handling refrigerated/cryogenic liquids.
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. Attempt to stop leak if without undue personnel hazard. Use water spray to knock-down vapors.
Stability
Polymerizes readily, particularly if oxygen is present. The commercial material contains an inhibitor to prevent spontaneous polymerization during shipment or storage.
Incompatibilities
Chlorine, fluorine and other oxidizing agents.
Decomposition
May decompose explosively when heated above 200 C 1 kbar. When heated to decomposition it emits acrid smoke and fumes.

Fire.
Flash Point,°C
-76
Autoignition, °C
420
Upper exp. limit, %
11.5
Lower exp. limit, %
2
Fire fighting
Move container from fire area if it can be done without risk. For fires in cargo or storage area: Cool containers with water from unmanned hose holder or monitor nozzles until well after fire is out. If this is impossible then take the following precautions: Keep unnecessary people away, isolate hazard area and deny entry. Let the fire burn. Withdraw immediately in case of rising sound from venting safety device or any discoloration of tanks due to fire. For tank, rail car or tank truck: Stop leak if possible without personal risk. Let burn unless leak can be stopped immediately. For smaller tanks or cylinders extinguish and isolate from other flammables. Extinguish using carbon dioxide, regular dry chemical Large fires Use regular foam or flood with fine water spray.
Fire potential
Flammable gas. Dangerous fire hazard when exposed to heat, flame, or powerful oxidizers. Reaction with sodium nitrite forms a spontaneously flammable product. Exothermic reaction with boron trifluoride etherate + phenol.
Hazards
Vapors heavier than air and may travel a considerable distance to a source of ignition and flashback. Containers may explode in a fire due to polymerization.
Combustion products
Fire may produce irritating and/or toxic gases.
Health
2
 
Flammability
4
 
 
Reactivity
2
 

Health.
Exposure limit(s)
TLV: 10 ppm; 22 mg/m3 (as TWA, A2) (ACGIH 1992-1993). OSHA PEL: TWA 1 ppm ST 5 ppm NIOSH REL: Ca See Appendix A NIOSH IDLH: Potential occupational carcinogen 2000 ppm LEL
Carcinogin
O, G-A2, I-2A, N-1, CP65
Poison_Class
1*
Exposure effects
1,3-Butadiene has anesthetic action and at a very high concentrations causes CNS depression. Exposure to 10,000 ppm for 5 minutes produce slight irritation and dryness of the nose and mouth and some increase in pulse rate but no effect on blood pressure or respiration. Signs and symptoms of overexposure are blurred vision, nausea, prickling and dryness of the mouth, throat, and nose, followed by fatigue, headache, vertigo, nausea, decreased blood pressure and pulse rate, unconsciousness, and respiratory paralysis. Aspiration of this product into the lungs can cause chemical pneumonitis and can be fatal.
   Ingestion
Frostbite.
   Inhalation
Respiratory paralysis resulting in death has occurred in animals. Coughing has been reported from higher but unspecified exposure concentrations in humans.
   Skin
Splash contact may cause mild to moderate skin irritation or frostbite.
   Eyes
Exposures of industrial workers to concentrations of 2,000 to 8,000 ppm have been reported to cause eye, skin, and nasal irritation. Headache and blurred vision can occur with CNS depression. Prickling and dryness of the nose, mouth and throat may occur.

First aid
 
   Ingestion
This compound is a gas, therefore inhalation is the first route of exposure.
   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
CAUTION: Exposure of skin to compressed gases may result in freezing of the skin. Treatment for frostbite may be necessary. Remove the victim from the source of contamination. IMMEDIATELY wash affected areas gently with COLD water (and soap, if necessary) while removing and isolating all contaminated clothing. Dry carefully with clean, soft towels. Call a hospital or poison control center IMMEDIATELY even if no symptoms (such as inflammation or irritation) develop. Be prepared to transport the victim to a hospital for treatment after washing the affected area if advised to do so by a physician.
   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
1010
Response guide
Hazard class
2.1
USCG CHRIS Code
BDI
 
Std. Transport #
4905704 4905703 4905705
 
IMO Gas Code
B