1-Butene

  • n-Butene
  • n-Butylene
  • Ethylethylene
  • Butylene
  • But-1-ene
Formula
CH3CH2CH CH2
Structure
Description
Colorless gas.
Uses
1-Butene is used for the production of a wide variety of chemicals in the gasoline and rubber processing areas.

Registry Numbers and Inventories.
CAS
106-98-9
EC (EINECS/ELINCS)
203-449-2
EC Index Number
601-012-00-4
EC Class
Extremely flammable
S 9 16 33
UN (DOT)
1012
Merck
13,1512
Beilstein/Gmelin
1098262
Beilstein Reference
4-01-00-00765
Swiss Giftliste 1
G-7569
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
<-190
Boiling point, °C
-6.1
Vapor pressure, mmHg
1151 (5 C)
Vapor density (air=1)
1.93
Odor Threshold Odor threshold 69 ppb
Critical temperature
146
Critical pressure
39.67
Density
0.6255 g/cm3 (20 C)
Solubility in water
Insoluble
Viscosity
0.88 cp (-80 C)
Surface tension
0.0121 g/s2 at 298.15 K
Refractive index
1.3962 (20 C)
Partition coefficient, pKow
2.40
Thermal expansion
0.0022/K at 20 C
Heat of fusion
38.51 kJ/mol
Heat of vaporization
20.37 kJ/mol
Heat of combustion
-2719 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. Always wear thermal protective clothing when handling refrigerated/cryogenic liquids.
Respirators
When working with this chemical, wear a NIOSH-approved full face positive pressure supplied-air respirator or a self-contained breathing apparatus (SCBA).
Small spills/leaks
This chemical should be used in a fume hood. If a leak should occur, the main valve of the gas cylinder should be turned off and all personnel evacuated. Do not reenter the area until the Safety Officer (or other responsible person) has verified that the area has been properly ventilated.
Stability
No data.
Incompatibilities
May react vigorously with strong oxidizers Can react exothermically to release gaseous hydrogen May react with oxidizing materials Reacts with alkenes and in the presence of oxygen, combustion is initiated even in the absence of moisture.
Decomposition
May explode on heating. Reacts violently with oxygen and oxidizers, causing fire and explosion hazard.

Fire.
Flash Point,°C
-79
Autoignition, °C
384
Upper exp. limit, %
9.3
Lower exp. limit, %
1.6
Fire fighting
Fires involving this material can be controlled with a dry chemical, carbon dioxide or Halon extinguisher. Vapor is heavier than air and may travel long distances to an ignition source and flash back.
Fire potential
This chemical is flammable.
Hazards
Vapor is heavier than air and may travel long distances to an ignition source and flash back.
Health
1
 
Flammability
4
 
 
Reactivity
0
 

Health.
Exposure limit(s)
800 ppm
Poison_Class
5
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
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. If symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a physician and be prepared to transport the victim to a hospital. 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. If symptoms such as inflammation or irritation develop, IMMEDIATELY call a physician or go to a hospital for treatment.
   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
1012
Response guide
Hazard class
2.1