Butene (mixed isomers)

  • Alpha butylene
  • Beta butylene
  • Butene 1
  • Butene 2
  • Dimethylethylene
  • I-Butene
Formula
CH3CH CHCH3
Structure
Description
Colorless gas. Mixture of two isomers (cis and trans).
Uses
Intermediate for butadiene, heptenes, sec-butyl alc, butylene oxide, prodn of high-density polyethylene & polymer gasolines.

Registry Numbers and Inventories.
CAS
107-01-7
EC (EINECS/ELINCS)
203-452-9
EC Index Number
601-012-00-4
EC Class
Extremely flammable
RTECS
EM2932000
RTECS class
Other
UN (DOT)
1012
Merck
12,1549
Beilstein/Gmelin
1718755
Beilstein Reference
3-01-00-00732
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C4H8
Formula mass
56.11
Melting point, °C
-127
Boiling point, °C
0.88
Vapor density (air=1)
1.9
Odor Threshold Odor threshold Odorless
Critical temperature
155
Critical pressure
41.00
Density
0.6105 g/cm3 (18 C)
Solubility in water
Insoluble
Surface tension
13.51 g/s2 (20 C)
Thermal expansion
0.0022/K at 20 C

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
Where contact is likely, wear protective clothing, covering all parts of the body, gloves, boots and goggles or a face shield.<BR>Where contact may occur, wear long sleeves, chemical-resistant gloves and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
ELIMINATE all ignition sources and groumd all equipment used when handling the product. Do not touch spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. A vapor suppressing foam may be used to reduce vapors. FOR CHLOROSILANES, use AFFF alcohol-resistant medium expansion foam to reduce vapors. DO NOT GET WATER on spilled substance or inside containers. Cover with DRY earth, DRY sand, or other non-combustible material followed with plastic sheet to minimize spreading or contact with rain. Use clean non-sparking tools to collect material and place it into loosley covered plastic containers for later disposal.
Stability
The substance can polymerize on contact with organic and inorganic acids, halogens and halogenic substances.
Incompatibilities
May react vigorously with strong oxidizers Can react exothermically to release gaseous hydrogen May react with oxidizing materials May react with oxidizing materials Reacts violently in mixtures with oxygen.
Decomposition
When heated to decomposition it emits acrid smoke and irritating vapors.

Fire.
Autoignition, °C
324
Upper exp. limit, %
10
Lower exp. limit, %
1.6
Fire fighting
Note: Most foams will react with the material and release corrosive/toxic gases. Small Fires: carbon dioxide, dry chemical, dry sand, alcohol-resistant foam. Large Fires: Water spray, fog or alcohol-resistant foam.
Fire potential
Highly flammable. Dangerous fire.
Hazards
Vapors form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapors may travel to source of ignition and flash back. Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff.
Combustion products
Fire will produce irritating, corrosive and/or toxic gases.
Health
1
 
Flammability
4
 
 
Reactivity
0
 

Health.
Exposure limit(s)
800 ppm
Exposure effects
Rapid breathing and rapid heart rate are common. In severe cases abnormally low blood pressure, apnea, and cardiac arrest develop. Various disturbances including headache, dizziness, mood disturbances, numbness of the extremities, sleepiness, mental confusion, poor judgement and coordination, and memory loss may occur. Prolonged or severe hypoxia results in unconsciousness. Prolonged asphyxia may produce CNS injury. Hemiparesis has been reported with volatile substance abuse. Cerebral edema with brainstem herniation may occur. Seizures have been reported following intentional inhalation.
   Ingestion
Nausea, vomiting, and gastrointestinal hemorrhage may develop.
   Inhalation
Hyperventilation may develop.
   Skin
Dermal exposure may cause frostbite injury. Severe tissue burns have been reported.
   Eyes
Decreases in night vision, visual acuity, and visual fields (tunnel vision) may occur. Frothy mucous may be seen.

First aid
 
   Ingestion
Seek medical assistance.
   Inhalation
Administer 100% humidified supplemental oxygen with assisted ventilation as required. If hypoxia has been severe or prolonged, carefully evaluate for neurologic sequelae and provide supportive treatment as indicated.
   Skin
Rewarming and a variety of topical treatments are indicated for frostbite injury. See main section for more information.
   Eyes
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.

Transport.
UN number
1012
Response guide
Hazard class
2.1