2710.12.45 - Mixtures of hydrocarbons not elsewhere specified or included, which contain by weight not over 50 percent of any single hydrocarbon compound

This HTS category, 2710.12.45, encompasses mixtures of hydrocarbons that are not otherwise specified or included in other categories. A key defining characteristic of these mixtures is their composition: they contain no single hydrocarbon compound that constitutes more than 50 percent by weight of the total mixture. This specific threshold differentiates them from broader hydrocarbon mixtures where a dominant component might exist.

Within the context of light oils and preparations, this category serves as a distinct classification for complex hydrocarbon mixtures that do not fall under more specific descriptions. It is distinguished from its sibling category, 2710.12.90.00 ("Other"), which would typically be a residual category for light oil preparations not meeting the specific criteria of 2710.12.45 or any other subheadings.

The subdivisions within 2710.12.45 provide further specificity for particular applications or compositions. These include "Insulating or transformer oils" (2710.12.45.45), designated for their electrical properties; "Renewable fuels blends" (2710.12.45.60), which are characterized by a significant biofuel content; and a residual "Other" (2710.12.45.95) for mixtures that meet the 50% single hydrocarbon limit but don't fit the other defined subcategories.