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💾 Data Updated: 2025 HTS Revision 30 • Last updated: November 24, 2025

2904 - Sulfonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated:

Sub-classifications

Commodity Code
Description

Overview

This HTS category, 2904, encompasses organic chemical compounds derived from hydrocarbons that have undergone sulfonation, nitration, or nitrosation. These processes involve the addition of sulfonic acid (-SO3H), nitro (-NO2), or nitroso (-NO) groups to the hydrocarbon structure. The category also includes such derivatives that may be further halogenated (e.g., with chlorine, bromine, or fluorine). This broad classification covers a range of intermediates and finished chemical products used in various industrial applications.

Distinguishing this category from its siblings at the Section VI/Chapter 29 level is crucial. While other chapters within Section VI deal with broader categories like plastics, essential oils, or dyeing extracts, Chapter 29 specifically focuses on pure organic chemicals. Within Chapter 29, 2904 is distinct from other hydrocarbon derivatives in that it specifically addresses those modified by sulfonation, nitration, or nitrosation. For instance, simple halogenated hydrocarbons would fall under a different HTS code, and alcohols or ethers, even if also halogenated, would be classified elsewhere.

The subcategories within 2904 provide further granularity based on the specific functional groups present. For example, 2904.10 focuses on derivatives containing exclusively sulfo groups and their simple salts and ethyl esters. 2904.20 isolates derivatives with only nitro or nitroso groups. The remaining subcategories cover more complex or less specified derivatives, such as those containing perfluorooctane sulfonic acid and its related compounds, or "other" derivatives that do not fit into the more specific classifications. These subdivisions are essential for accurate duty assessment and trade statistics.

Go up to Chapter 29: Organic chemicals

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