2904.99.40.00 - Products described in additional U.S. note 3 to section VI

This HTS category, 2904.99.40.00, encompasses a specific group of sulfonated, nitrated, or nitrosated derivatives of hydrocarbons that are not otherwise classified under more specific headings within Chapter 29. The defining characteristic for inclusion here is the presence of specific substances as outlined in additional U.S. note 3 to Section VI. This note provides crucial parameters that determine whether a product falls under this residual classification, often related to the purity, specific application, or unique chemical modifications of the hydrocarbon derivative.

This classification is distinguished from its sibling category, 2904.99.47.00, which is also designated as "Other." The primary distinction between these two "other" categories lies in the precise wording and scope of additional U.S. note 3. Importers must carefully consult this note to determine if their product meets the specific criteria for classification under 2904.99.40.00, rather than being directed to the slightly different, yet similarly residual, "other" classification at the same level.

As this is a leaf node, there are no further subcategories. Therefore, successful classification into 2904.99.40.00 hinges entirely on a thorough understanding and application of additional U.S. note 3 to Section VI. This typically involves examining the product's chemical composition, the process of its manufacture (specifically the sulfonation, nitration, or nitrosation steps), and any specific functional or purity requirements stipulated by the note. Accurate classification requires careful adherence to these detailed provisions to ensure compliance with customs regulations.