1. A colorless, flammable hydrocarbon gas (C₄H₈) used in the production of synthetic rubber, plastics, and other industrial chemicals.
Usage: chemistry; also called 2-methylpropene or isobutene; commonly used in industrial and chemical contexts

Examples

• Isobutylene is a key raw material in the manufacture of butyl rubber.
• The chemical plant produces isobutylene through the dehydrogenation of isobutane.
• Isobutylene polymerizes readily to form various plastics and elastomers.
• Industrial demand for isobutylene has increased due to its use in fuel additives.
• The reaction between isobutylene and water produces tert-butanol.