2-butylene is a colorless gas that belongs to the group of hydrocarbons known as alkenes. It has the chemical formula C4H8 and features a double bond between two of its carbon atoms. This compound is commonly used in the production of various chemicals and plastics, making it an important building block in the chemical industry. There are two main isomers of 2-butylene: cis-2-butylene and trans-2-butylene, which differ in the arrangement of their atoms around the double bond. These isomers have distinct physical properties and applications, contributing to their significance in industrial processes and research.