2901.24.10.00 - Buta-1,3-diene

This HTS category specifically classifies buta-1,3-diene, a colorless gas with a mild odor that is a basic building block in the petrochemical industry. It is primarily utilized in the production of synthetic rubber, plastics, and other polymers, playing a crucial role in the manufacturing of tires, hoses, and various plastic products. Its classification is based on its specific chemical structure as an acyclic, unsaturated hydrocarbon with four carbon atoms and two conjugated double bonds.

Within the broader group of buta-1,3-diene and isoprene, this classification strictly pertains to buta-1,3-diene. Its sibling category, "Isoprene," covers a different diene with the chemical formula C5H8. While both are unsaturated hydrocarbons used in polymer production, isoprene possesses five carbon atoms and serves as a key component in natural rubber and synthetic isoprene rubber, distinguishing it from the four-carbon structure and applications of buta-1,3-diene.

As a leaf node, this HTS code represents the most granular level of classification for buta-1,3-diene. No further subdivisions exist for this specific chemical. Classification at this level is determined by the precise chemical identity and primary industrial uses of buta-1,3-diene, ensuring accurate tariff application for this fundamental petrochemical compound.