noun Chemistry.
a colorless, very volatile liquid or flammable gas, C 4 H 8 , used chiefly in the manufacture of butyl rubber.
Also, isobutene [ahy-suh-byoo-teen] .

1870–75; iso- + butylene Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To isobutylene
Example sentences
Frequently, isobutylene gas in air is used as a calibration gas.
The meter can then be used to read directly in isobutylene units.
Again the main products are acetone, isobutylene and aromatics.
Isobutylene is separated from n-butane which is later used in the manufacturing of butadiene.
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