2910.90.10.00 - Butylene oxide

This HTS classification covers "butylene oxide," a specific organic chemical compound. It falls under the broader category of epoxides, epoxyalcohols, epoxyphenols, and epoxyethers, which are characterized by a three-membered ring structure. Butylene oxide, also known as 1,2-epoxybutane or 2,3-epoxybutane depending on the isomer, is a reactive intermediate used in the synthesis of various polymers, resins, and other chemical products. Its classification hinges on the presence of this characteristic epoxide ring and its specific butylene-based structure.

Within the "Other" subheading for epoxides, butylene oxide is distinguished by its specific four-carbon chain structure. While the broader category encompasses a wide range of compounds with a three-membered ring, this particular classification focuses on the specific chemical entity of butylene oxide, differentiating it from other epoxides like ethylene oxide or propylene oxide, which would be classified elsewhere. The "Other" designation at this level indicates that it is a specific epoxide not otherwise enumerated in preceding subheadings.

As a leaf node, HTS code 2910.90.10.00 does not have further subcategories. Therefore, classification within this code is definitive for butylene oxide. The key factor for correct classification is the identification of the substance as butylene oxide, based on its chemical identity and properties, ensuring it is not confused with more complex epoxides or derivatives thereof that might fall under different headings or subheadings.