Mixed alkylbenzenes and mixed alkylnaphthalenes — HTS 3817
Mixed alkylbenzenes and mixed alkylnaphthalenes, other than those of heading 2707 or 2902
Chapter 38 › Heading 3817
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 3817 is a broad product category for mixed alkylbenzenes and mixed alkylnaphthalenes. These are chemical mixtures made by adding alkyl groups to benzene or naphthalene structures. The heading applies only when the goods are not covered by heading 2707 or heading 2902, so those competing headings must be considered first.
To reach the correct 8-digit HTSUS code, start with the product’s chemical identity and composition, then follow the applicable subheading descriptions under heading 3817. The lower-level codes generally distinguish the type of mixture or material, rather than relying only on the product’s brand name or commercial use. The product’s specification sheet, safety data sheet, manufacturing process, and laboratory composition may be needed to support the classification.
What to check
- Confirm that the product is a mixed alkylbenzene or mixed alkylnaphthalene, not a single chemically defined compound.
- Check headings 2707 and 2902 first, because heading 3817 excludes products classified there.
- Review the 8-digit subheading text for the relevant mixture or material distinction; do not stop at the 4-digit heading.
- Compare the product’s chemical composition, carbon range, and manufacturing description with the HTSUS wording and legal notes.
- Keep technical documents and, where the classification is uncertain, request a binding ruling or consult a qualified customs broker.
HTS heading 3817 summary
Mixed alkylbenzenes and mixed alkylnaphthalenes is a 4-digit product category containing 3 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.
Product codes & duty rates
👇 Each row is a specific product code — click a blue code to open its full page with exact duty rates by country, the rate-history chart, and a duty calculator. 👉
| Code | Description | General (MFN) | Special | Column 2 |
|---|---|---|---|---|
| 3817.00.10.00 👉 | Mixed linear alkylbenzenes | 6.5% | Free | 15.4¢/kg + 55% |
| 3817.00.15.00 👉 | Other | 6.5% | Free | 15.4¢/kg + 55% |
| 3817.00.20.00 👉 | Mixed alkylnaphthalenes | 6.5% | Free | 3.7¢/kg + 60% |
"Special" shows the free-trade-agreement rate; open a code to see exactly which countries qualify.
Common questions
What products fall under HTS heading 3817?
Mixed alkylbenzenes and mixed alkylnaphthalenes, other than those of heading 2707 or 2902. 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.