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C4H8

1-Butene

Colorless, flammable, liquefied gas with a mildly aromatic odor.
Shipping Information
D.O.T. Proper Shipping Name:
Butylene
I.D. Number:
UN1012
Hazard Class:
2.1
Shipping Labels:
Flammable Gas
Technical Information
Molecular weight:
56.108
Specific volume:
6.7 ft3/lb
CAS registry:
106-98-9
SDS ref:
1-Butene
About

1-butene is a straightforward but fascinating hydrocarbon molecule belonging to the alkene family, consisting of four carbon atoms arranged in a chain with a double bond positioned between the first and second carbons (hence the “1-” in its name). At room temperature, this colorless gas exhibits characteristic alkene behavior, being moderately reactive due to that energy-rich double bond – quite unlike the passive noble gases. The double bond acts like a chemical handshake point, making 1-butene eager to participate in addition reactions where the bond can be broken to form new compounds. This reactivity makes it a valuable building block in the petrochemical industry, where it serves as a starting material for producing plastics, synthetic rubber, and other polymer products.

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