Spent steam-cracked C4 product
Colorless gas or liquid. This is cracked C4 after both butadiene and isobutene have been extracted.
Registry Numbers and Inventories.
Melting point, °C
Boiling point, °C
-8 to 4
Odor Threshold Odor threshold Varies
1.5465 (25 C)
Hazards and Protection.
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.
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.
Wear appropriate protective gloves, clothing and goggles. Always wear thermal protective clothing when handling refrigerated/cryogenic liquids.
Wear positive pressure self-contained breathing apparatus (SCBA).
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.
Upper exp. limit, %
Lower exp. limit, %
Extinguish fire with flooding quantities of water or use dry chemical or carbon dioxide.
EXTREMELY FLAMMABLE. Will be easily ignited by heat, sparks or flames. Will form explosive mixtures with air.
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.
The toxological properties of this substance have not been fully investigated.
Acute effect - High vapor concentrations are irritating to the respiratory tract. Headaches, dizziness and drowsiness. Slight narcotic effect
Liquid - Frostbite. Vapor - No hazard in normal industrial usebut may there may be some tissue damage due to low temperature.
Liquid - Irritating but does not injure eye. Frostbite is possible. Vapor - May be some tissue damage due to low temperature. High vapor concentrations may be irritating to the eyes.
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.
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Administer oxygen if breathing is difficult.
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
Flush with running water for at least 20 minutes.