Product classification

HS code for MOP fertilizer: 3104.20

Fertilizers, mineral or chemical, potassic, potassium chloride.

Classification of MOP fertilizer under HS 3104.20

Muriate of Potash (MOP), chemically known as potassium chloride, is classified under HS code 3104.20. This classification falls within Chapter 31, which covers fertilizers. The code 3104.20 specifically identifies potassium chloride as a mineral or chemical potassic fertilizer. Classification is driven by the chemical purity and the intended use of the product as a soil nutrient. Even if the potassium chloride is of high purity for industrial use, it remains under 3104.20 unless it is presented in specific forms like tablets or small packages, which might move it to 3105. The Harmonized System prioritizes the chemical identity of potassic salts within this heading, provided they are not specifically excluded by the chapter notes.

Covers
  • Granular Muriate of Potash (60% K2O)
  • Standard/Powder MOP for direct application
  • Soluble grade potassium chloride for fertigation
  • Red MOP (containing iron oxide traces)
  • White MOP (refined potassium chloride)
Also under 3104.20
  • Nutrien MOP
  • Uralkali MOP
  • Belaruskali MOP
  • K+S MOP
  • Mosaic MOP.

Codes often confused with 3104.20

Common mistake. MOP is often confused with Potassium Sulfate, which is classified under HS code 3104.30. While both are potassic fertilizers, the sulfate variant is chloride-free and used for sensitive crops. Another common misclassification occurs with HS code 3105.20, which is for NPK compound fertilizers. MOP is a straight fertilizer containing only one primary nutrient (potassium), whereas 3105 is for mixtures containing two or three fertilizing elements. Additionally, pure potassium chloride in the form of cultured crystals (other than optical elements) weighing not less than 2.5g each is classified under 3824.

3104.30Fertilizers, mineral or chemical; potassic, potassium sulphate3105.20Fertilizers, mineral or chemical; containing the three fertilizing elements nitrogen, phosphorus and potassium31.05Fertilizers; mineral or chemical, containing 2 or 3 of the elements nitrogen, phosphorus, potassium; other fertilisers; goods of chapter 31 in tablets or packages of gross weight not exceeding 10kg38.24Prepared binders for foundry moulds or cores; chemical products and preparations of the chemical or allied industries (including those consisting of mixtures of natural products), not elsewhere specified or included

Top exporters and importers of HS 310420 (the code used for MOP fertilizer), 2025

In 2025, the largest exporter of HS 310420 (the code used for MOP fertilizer) in UN Comtrade data was Canada, with 35% of world exports; the largest importer in UN Comtrade data was Brazil, with 22% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.

Figures cover everything classified under HS 310420, not only MOP fertilizer.

Top exporters 2025 · share of world exports

  1. 1 Canada $6.4B
  2. 2 Russia* ~$5.6B
  3. 3 United States $1.1B

World total: $18.5B Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

  1. 1 Brazil $4.6B
  2. 2 China $4.0B
  3. 3 United States $3.5B

World total: $20.5B 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 MOP fertilizer

Brazil splits HS 3104.20 into 2 NCM codes. Pick the one that matches your product:

Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.

Questions about MOP fertilizer

What is the HS code for MOP fertilizer?

The HS code for MOP fertilizer is 310420 (Fertilizers, mineral or chemical; potassic, potassium chloride). The HS code for Muriate of Potash (potassium chloride) fertilizer is 3104.20.

How do I classify MOP fertilizer for customs?

MOP fertilizer is classified under HS code 310420 — Fertilizers, mineral or chemical; potassic, potassium chloride. This is a 6-digit subheading level code.

Does the color of MOP affect its HS code?

No, both Red MOP and White MOP are classified under 3104.20, as the color difference is usually due to trace minerals or refining processes that do not change the primary chemical identity.

Which countries are the top exporters of MOP fertilizer (HS 310420)?

In 2025, the top exporters of HS 310420 (the code used for MOP fertilizer) in UN Comtrade data were Canada ($6.4B, 35% of world exports), Russia (about $5.6B) and the United States ($1.1B). World exports came to about $18.5B, 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.

Which countries are the top importers of MOP fertilizer (HS 310420)?

In 2025, the top importers of HS 310420 (the code used for MOP fertilizer) in UN Comtrade data were Brazil ($4.6B, 22% of world imports), China ($4.0B) and the United States ($3.5B). World imports came to about $20.5B, 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 MOP fertilizer the same in all countries?

The base HS code 310420 for MOP 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 MOP fertilizer in Brazil?

Brazil splits HS 310420 into 2 NCM codes, so the right one for MOP fertilizer depends on the product's details: 3104.20.10 (Potassium chloride, 60% K2O or less), 3104.20.90 (Potassium chloride, over 60% K2O).