2901.24.50.00 - Other

This HTS category, 2901.24.50.00, specifically covers "Other" acyclic hydrocarbons that are unsaturated and fall within the buta-1,3-diene and isoprene group, but are not isoprene itself. This means it encompasses compounds that share the unsaturated acyclic hydrocarbon structure of buta-1,3-diene and isoprene, but do not meet the specific definitions or purity requirements of other classifications within this heading. Its primary function is to act as a residual category for unsaturated acyclic hydrocarbons within this narrow chemical family that are not otherwise precisely categorized.

Crucially, this category differentiates itself from its sibling, 2901.24.20.00, by excluding isoprene with a purity of 95 percent or more by weight. The sibling classification is for a highly purified form of isoprene, a specific unsaturated cyclic hydrocarbon. Therefore, 2901.24.50.00 will include any unsaturated acyclic hydrocarbons belonging to the buta-1,3-diene and isoprene family that are either not isoprene, or are isoprene with a purity below 95 percent by weight. This distinction relies on the chemical identity and the degree of purification of the substance.

As a leaf node within the HTS classification system, there are no further subcategories under 2901.24.50.00. The classification of goods under this heading will depend on their precise chemical composition and whether they fit the general description of unsaturated acyclic hydrocarbons within the buta-1,3-diene and isoprene family, while also not qualifying for more specific sibling categories. Practical classification will involve laboratory analysis to confirm the hydrocarbon structure and purity levels to ensure accurate duty assessment.