2904.10.50.00 - Other

This HTS category, HTS 2904.10.50.00, encompasses "Other" sulfonated, nitrated, or nitrosated derivatives of hydrocarbons, where these derivatives exclusively contain sulfo groups or are their salts and ethyl esters, and are not otherwise specified. This includes compounds that are not aromatic in nature. The classification hinges on the presence of sulfo (-SO3H) functional groups, their corresponding salts, or ethyl esters, and the absence of other significant functional groups (like nitro or nitroso) that would direct them to a different subheading.

Unlike its sibling category, which covers aromatic derivatives, this subheading is reserved for aliphatic or acyclic compounds. This distinction is crucial for accurate classification, as the chemical structure (whether the hydrocarbon chain is ring-based or linear) dictates placement. For instance, sulfonated alkanes or alkenes, or their salts and ethyl esters, would fall under this "Other" category if they do not possess aromatic characteristics.

As a leaf node in the HTS, HTS 2904.10.50.00 represents a specific endpoint for classification. Therefore, classification under this code is determined by the definitive presence of sulfo groups (or their salts/ethyl esters) in a non-aromatic hydrocarbon derivative, and the absence of any other chemical features that would warrant classification under a more specific or alternative subheading within Chapter 29. Practical application often involves careful analysis of the chemical composition and structure of the imported substance.