Sulfonated — HTS 2904
Sulfonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated
Chapter 29 › Heading 2904
2026 HTS Rev 19 Synced Rules verified Operational
Written to help non-specialists understand this page. Rates, dates, and legal facts come from the official records above and on the linked source.
HTS heading 2904 is a four-digit product category for certain chemical derivatives of hydrocarbons. It covers hydrocarbons that have been chemically modified by sulfonation, nitration, or nitrosation, including products that are also halogenated. In plain language, the heading is organized around the chemical reaction or functional group added to the hydrocarbon, not simply the product’s brand name or commercial use.
The four-digit heading is only the starting point. To reach the correct eight-digit HTSUS subheading, identify the exact chemical substance and follow the more detailed divisions, which commonly distinguish the derivative’s material or chemical type. Review the product’s composition, chemical name, structural information, and any applicable chapter or section notes. If the chemistry does not clearly match a listed provision, classification may require a customs broker or other qualified tariff professional.
What to check
- Obtain the supplier’s safety data sheet, specification sheet, and exact chemical name or CAS Registry Number; do not rely only on the marketing name.
- Confirm whether the product is actually a sulfonated, nitrated, or nitrosated hydrocarbon derivative, and determine whether halogenation is also present.
- Read the complete heading 2904 subheading structure and the relevant HTSUS notes before selecting an eight-digit code; compare the product’s chemistry with each description.
- Check whether the product is a pure chemical, mixture, solution, preparation, or formulated product, because that may affect classification outside the expected provision.
- Keep written support for the classification and seek a customs broker or binding ruling when the chemical structure, composition, or competing provisions create uncertainty.
HTS heading 2904 summary
Sulfonated is a 4-digit product category containing 0 published product-code lines in this snapshot. A heading does not carry one universal duty rate; classification must be narrowed to the line matching the product facts.
How to find your code in this category
A heading is a product category. To get the exact duty, narrow from this 4-digit heading to a sub-category (usually by material), then open the 8-digit code that matches your product.
Open any code in the tables below to see its exact duty rate, a duty calculator (enter your shipment value → estimated duty and landed cost), the rate-change history chart, and the country-by-country breakdown (including Section 301/232 add-on duties).
Why you have to click in: a single category can contain products with very different duties. The rate depends on the specific product — its material and construction — and on the country of origin, and those only get pinned down at the 8-digit code level. That is why this page points you to codes instead of showing one rate for the whole category.
Sub-categories
| Code | Description |
|---|---|
| 2904.10 | Derivatives containing only sulfo groups, their salts and ethyl esters |
| 2904.20 | Derivatives containing only nitro or only nitroso groups |
Common questions
What products fall under HTS heading 2904?
Sulfonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated. To classify a specific item you must pick the matching sub-category and 8-digit code above; the right choice usually depends on the material and construction of the product.
How do I choose the right code within this category?
Start from the sub-categories (typically divided by material—for example cotton versus man-made fibers), then open the active 8- or 10-digit code that matches the product. When unsure, a licensed customs broker or a CBP binding ruling can confirm the classification.
Reference information only, not customs, legal, or classification advice. Confirm the current code and rate against the official HTS before you import.