2710.99.45.00 - Mixtures of hydrocarbons not elsewhere specified or included, which contain not over 50 percent of any single hydrocarbon compound

This HTS classification, 2710.99.45.00, specifically covers mixtures of hydrocarbons that are not otherwise classified and contain no single hydrocarbon compound exceeding 50 percent by weight. These are essentially complex blends where no individual hydrocarbon dominates. Such mixtures are typically found in specialized industrial applications or as byproducts from refining processes that do not fit into more specific categories based on the presence of a single constituent.

Distinguishing this category from its sibling, 2710.99.90.00 (Other), is crucial. While 2710.99.90.00 serves as a residual classification for any "other" waste oils not explicitly enumerated, 2710.99.45.00 has a more defined scope. The key differentiator lies in the compositional limit: the 50 percent single hydrocarbon compound threshold. If a waste oil mixture contains a single hydrocarbon compound at 50 percent or more, it would fall under a different, more specific subcategory if one existed, or potentially be classified under the broader "Other" category if no other specific provision applies and the 50% rule isn't met.

As a leaf node, 2710.99.45.00 does not have further subdivisions. Therefore, classification within this heading relies heavily on the precise chemical composition and the absence of a dominant single hydrocarbon. Examples might include certain mixed solvent wastes, residues from specialized chemical processes, or complex hydrocarbon mixtures generated during oil production or refining that do not meet the criteria for inclusion in more specific waste oil headings, and importantly, do not have a single hydrocarbon compound comprising over 50% of their composition.