Butane mixture, gas

  • n-Butane/isobutane mixture
Formula
C4H10
Description
Colorless gas with a faint gasoline-like odor.

Registry Numbers and Inventories.
UN (DOT)
1011
Beilstein/Gmelin
NA

Properties.
Formula
C4H10
Formula mass
58.12
Melting point, °C
n-butane: -138 C, isobutane: -160 C
Boiling point, °C
n-butane: -5 , isobutane: -12
Vapor pressure, mmHg
1823
Vapor density (air=1)
2.0
Odor Threshold Odor threshold 5000 ppm
Density
0.58 g/cm3
Solubility in water
Insoluble
Thermal expansion
0.002/K at 15 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
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
Make no contact with the spilled material. ELIMINATE all ignition sources, combustibles and ground all equipment. Take up with sand or other noncombustible absorbent material and place into containers for later disposal.
Stability
No data.
Incompatibilities
Dangerous reaction possible with chlorine.

Fire.
Flash Point,°C
-60
Autoignition, °C
n-butane - 365 C<br>isobutane - 460 C
Upper exp. limit, %
9
Lower exp. limit, %
1.5
Fire fighting
Extinguish fire with flooding quantities of water or use dry chemical or carbon dioxide.
Fire potential
EXTREMELY FLAMMABLE. Will be easily ignited by heat, sparks or flames. Will form explosive mixtures with air.
Hazards
Vapors from liquefied gas are initially heavier than air and spread along ground. Vapors may travel to source of ignition and flash back. Containers may explode when heated.

Health.
Exposure limit(s)
600 ppm
Exposure effects
The toxological properties of this substance have not been fully investigated.
   Inhalation
Acute effect - Asphyxiation at high concentrations, headaches, dizziness and drowsieness.<br>Chronic effect - May be a narcotic.
   Skin
Tissue damage due to frostbite. Cold vapor could possibly cause frostbite.
   Eyes
Tissue damage due to frostbite. Cold vapor could possibly cause frostbite.

First aid
 
   Ingestion
Treat ingestions of greater than 40 milligrams per kilogram with decontamination of the stomach if within 4 hours of ingestion. Administer charcoal as a slurry.
   Inhalation
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Administer oxygen if breathing is difficult.
   Skin
Remove and isolate contaminated clothing and shoes. Clothing frozen to the skin should be thawed before being removed. In case of contact with liquefied gas, thaw frosted parts with lukewarm water
   Eyes
Flush with running water for at least 20 minutes.

Transport.
UN number
1011
Response guide
Hazard class
2.1
USCG CHRIS Code
CBM