Product classification
HS code for Potassium fertilizer: 3104.90
Fertilizers, mineral or chemical, potassic, n.e.c. in heading no. 3104.
Classification of potassium fertilizer under HS 3104.90
Potassium fertilizers that do not fall under the specific categories of potassium chloride or potassium sulfate are classified under HS code 3104.90. This is a residual or "basket" category within heading 3104, which covers mineral or chemical potassic fertilizers. Chapter 31 is dedicated to fertilizers, and the subheadings under 3104 are organized by specific chemical types. While 3104.20 covers potassium chloride and 3104.30 covers potassium sulfate, 3104.90 captures other potassic substances used for soil enrichment, such as crude natural potassium salts or mixtures of potassic fertilizers that do not meet the criteria for the specific subheadings. This ensures that all potassic mineral products intended for agricultural use are accounted for within the same heading. The classification is essential for agricultural statistics and for applying trade policies related to food security and soil health. Products in this category are typically used to provide the potassium necessary for plant growth, particularly in soils that are deficient in this primary macronutrient. The code applies regardless of whether the product is in liquid or solid form, provided it is a potassic fertilizer not specified elsewhere.
- Covers
- Crude natural potassium salts
- Carnallite and Kainite
- Sylvite and other potassic mineral salts
- Mixtures of potassic fertilizers not elsewhere specified
- Potassium magnesium sulfate (if not classified as a double salt elsewhere)
- Also under 3104.90
- Mosaic Potash
- Nutrien Potash
- ICL Potash
- K+S Potash
- Uralkali Potash
Codes often confused with 3104.90
Common mistake. This code is often confused with 3104.20 (Potassium chloride) or 3104.30 (Potassium sulfate) if the specific chemical nature of the fertilizer is not clearly identified. It can also be confused with 3105.20, which covers compound fertilizers containing nitrogen, phosphorus, and potassium (NPK). If the fertilizer contains more than just potassium as a primary nutrient, it must be moved to heading 3105.
Top exporters and importers of HS 310490 (the code used for potassium fertilizer), 2025
In 2025, the largest exporter of HS 310490 (the code used for potassium fertilizer) in UN Comtrade data was the United States, with 28% of world exports; the largest importer in UN Comtrade data was the Netherlands, with 8.6% of world imports. Russia did not report 2025 data, and its estimate from partner records misses its trade with other countries that did not report: in 2024 that was 0.3% of its exports here ($166K, CEPII BACI), so it may also belong among the top exporters.
Figures cover everything classified under HS 310490, not only potassium fertilizer.
Top exporters 2025 · share of world exports
- 1 United States $111M 28% of world exports
- 2 United Kingdom $101M 25% of world exports
- 3 Uzbekistan* ~$29M 7.3% of world exports · partner records ↗
Russia did not report 2025 data, and its estimate from partner records misses its trade with other countries that did not report: in 2024 that was 0.3% of its exports here ($166K, CEPII BACI), so it may also belong among the top exporters.
World total: $396M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Netherlands $47M 8.6% of world imports
- 2 Brazil $41M 7.5% of world imports
- 3 Canada $41M 7.5% of world imports
World total: $550M Reported figures on UN Comtrade ↗
How these figures are built
109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries marked * did not, so their figures add up what other countries recorded trading with them, and their exports are valued at buyers' CIF prices. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).
Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.
Brazil NCM codes for potassium fertilizer
Brazil splits HS 3104.90 into 2 NCM codes. Pick the one that matches your product:
- 3104.90.10Potassium magnesium sulphate, 30% K2O or more
- 3104.90.90Other potassic fertilizers
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about potassium fertilizer
What is the HS code for Potassium fertilizer?
The HS code for Potassium fertilizer is 310490 (Fertilizers, mineral or chemical; potassic, n.e.c. in heading no. 3104).
How do I classify Potassium fertilizer for customs?
Potassium fertilizer is classified under HS code 310490 — Fertilizers, mineral or chemical; potassic, n.e.c. in heading no. 3104. This is a 6-digit subheading level code.
What is the HS code for potassium fertilizer (other)?
The HS code for other potassic fertilizers not specifically named is 3104.90.
What is the code for NPK fertilizers?
NPK fertilizers, which contain multiple primary nutrients, are classified under heading 3105, specifically 3105.20.
Which countries are the top exporters of potassium fertilizer (HS 310490)?
In 2025, the top exporters of HS 310490 (the code used for potassium fertilizer) in UN Comtrade data were the United States ($111M, 28% of world exports), the United Kingdom ($101M) and Uzbekistan (about $29M). World exports came to about $396M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Russia did not report 2025 data, and its estimate from partner records misses its trade with other countries that did not report: in 2024 that was 0.3% of its exports here ($166K, CEPII BACI), so it may also belong among the top exporters.
Which countries are the top importers of potassium fertilizer (HS 310490)?
In 2025, the top importers of HS 310490 (the code used for potassium fertilizer) in UN Comtrade data were the Netherlands ($47M, 8.6% of world imports), Brazil ($41M) and Canada ($41M). World imports came to about $550M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Is the HS code for Potassium fertilizer the same in all countries?
The base HS code 310490 for Potassium fertilizer is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.
What is the NCM code for potassium fertilizer in Brazil?
Brazil splits HS 310490 into 2 NCM codes, so the right one for potassium fertilizer depends on the product's details: 3104.90.10 (Potassium magnesium sulphate, 30% K2O or more), 3104.90.90 (Other potassic fertilizers).