2711.14.00.30 - Butylene

This HTS category, 2711.14.00.30, specifically classifies **butylene**. Butylene, also known as butene, is a hydrocarbon gas consisting of four carbon atoms and eight hydrogen atoms (C4H8). It is typically found as a byproduct of petroleum refining and natural gas processing. In its pure form, butylene is a colorless, flammable gas.

This classification distinguishes butylene from its immediate siblings which include ethylene (C2H4), propylene (C3H6), and butadiene (C4H6). While all are gaseous hydrocarbons derived from similar processes, butylene is specifically defined by its molecular structure, containing four carbon atoms arranged in a chain with a double bond. The position of this double bond can further differentiate isomers of butylene (e.g., 1-butene, cis-2-butene, trans-2-butene), though this specific code encompasses all isomers of butylene.

As a leaf node within the HTS, this category does not have further subdivisions. Therefore, the classification of any product falling under 2711.14.00.30 relies on confirming that the substance is indeed butylene, regardless of its specific isomeric form or purity, provided it meets the general conditions for classification under Chapter 27 as a petroleum gas. Common applications for butylene include its use as a feedstock in the production of polymers, plastics, and synthetic rubber.