Mineral or chemical fertilizers containing two or three of — HTS 3105
Mineral or chemical fertilizers containing two or three of the fertilizing elements nitrogen, phosphorus and potassium; other fertilizers; goods of this chapter in tablets or similar forms or in packages of a gross weight not exceeding 10 kg
Chapter 31 › Heading 3105
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 3105 is a broad product category for certain fertilizers and related preparations. It covers mineral or chemical fertilizers containing two or three of the main fertilizing elements—nitrogen, phosphorus, and potassium—as well as other fertilizers and certain Chapter 31 goods presented in tablets or similar forms, or in small packages within the heading’s stated weight limit.
The 4-digit heading is only the starting point, not the complete tariff classification. To reach the correct 8-digit HTS code, review the product’s composition, the fertilizing elements it contains, its chemical or material type, physical form, and packaging. The relevant subheading may distinguish products by these characteristics, so use the product formula, technical documents, and the current HTS descriptions to match the most specific provision.
What to check
- Confirm the product’s full ingredient list and identify whether nitrogen, phosphorus, potassium, or combinations of them are present as fertilizing elements.
- Check the product’s chemical or material type, such as the particular fertilizer compound or preparation, rather than relying only on its marketing name.
- Verify the physical presentation, including whether it is in tablets, similar forms, bulk form, liquid form, or another stated presentation.
- Measure the relevant gross package weight and confirm whether the packaging provision applies to the imported product as presented.
- Compare the complete product facts with the current 8-digit HTS subheadings and seek a customs broker or binding ruling when the formulation or classification is uncertain.
HTS heading 3105 summary
Mineral or chemical fertilizers containing two or three of is a 4-digit product category containing 6 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 |
|---|---|---|---|---|
| 3105.10.00.00 👉 | Products of this chapter in tablets or similar forms or in packages of a gross weight not exceeding 10 kg | Free | — | Free |
| 3105.20.00.00 👉 | Mineral or chemical fertilizers containing the three fertilizing elements nitrogen, phosphorus and potassium | Free | — | Free |
| 3105.30.00.00 👉 | Diammonium hydrogenorthophosphate (Diammonium phosphate) | Free | — | Free |
| 3105.40.00 👉 | Ammonium dihydrogenorthophosphate (Monoammonium phosphate) and mixtures thereof with diammonium hydrogenorthophosphate (Diammonium phosphate) | Free | — | Free |
| 3105.60.00.00 👉 | Mineral or chemical fertilizers containing the two fertilizing elements phosphorus and potassium | Free | — | Free |
| 3105.90.00 👉 | 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 3105?
Mineral or chemical fertilizers containing two or three of the fertilizing elements nitrogen, phosphorus and potassium; other fertilizers; goods of this chapter in tablets or similar forms or in packages of a gross weight not exceeding 10 kg. 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.