Mineral or chemical fertilizers — HTS 3104
Mineral or chemical fertilizers, potassic
Chapter 31 › Heading 3104
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 3104 is a four-digit category for mineral or chemical fertilizers whose fertilizing value is mainly potassic, meaning they supply potassium to plants. It generally groups potassium-based fertilizer materials and certain potassic fertilizer products, rather than every product that happens to contain potassium. The heading is a starting point, not the final import classification.
To reach a specific eight-digit HTSUS code, narrow the product by its chemical identity, composition, and form. Subheadings may distinguish materials such as potassium chloride, potassium sulfate, or other potassic fertilizers, and further U.S. statistical subdivisions can depend on the product’s precise description. Review the current HTSUS wording and relevant legal notes; if the product is a blend or compound, classification may require analyzing all ingredients and the product’s essential character.
What to check
- Obtain the product’s technical data sheet, safety data sheet, laboratory composition, and packaging information.
- Confirm the potassium compound or compounds, nutrient analysis, physical form, and whether the product is a single substance, mixture, or formulated fertilizer.
- Read the complete heading, subheading, chapter notes, and any applicable U.S. statistical suffix descriptions rather than stopping at the four-digit heading.
- Compare the product’s commercial description with the tariff language; do not rely on a brand name, marketing claim, or a code supplied by a seller alone.
- Ask a customs broker or seek a formal classification ruling when the formulation is blended, unusual, or could fit more than one subheading.
HTS heading 3104 summary
Mineral or chemical fertilizers 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 |
|---|---|---|---|---|
| 3104.20.00 👉 | Potassium chloride | Free | — | Free |
| 3104.30.00.00 👉 | Potassium sulfate | Free | — | Free |
| 3104.90.01.00 👉 | Other | Free | — | Free |
"Special" shows the free-trade-agreement rate; open a code to see exactly which countries qualify.
Common questions
What products fall under HTS heading 3104?
Mineral or chemical fertilizers, potassic. 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.