Product classification

HS code for Sulfate of potash: 3104.30

Fertilizers, mineral or chemical, potassic, potassium sulphate.

Classification of sulfate of potash under HS 3104.30

Sulfate of potash (SOP), chemically known as potassium sulphate, is classified under HS code 3104.30. This classification is part of Chapter 31, which encompasses mineral or chemical fertilizers. Heading 3104 is dedicated specifically to potassic fertilizers. Within this heading, 3104.30 is the specific subheading for potassium sulphate. The classification is straightforward for pure or standard agricultural grades of the chemical. It is valued in agriculture for providing potassium without the high chloride content found in other potash sources, making it ideal for chloride-sensitive crops like tobacco, fruits, and vegetables. To qualify for this code, the product must be intended for use as a fertilizer or be of a grade typically used in such applications. The Chapter 31 notes are very specific: heading 3104 applies only to products used as fertilizers and not to products of Chapter 28 (chemicals) even if they could be used as fertilizers, unless they are in the forms described in the heading. Potassium sulphate is one of the few chemicals specifically named in the heading, which simplifies its classification. Importers should ensure that the purity levels and intended use are clearly stated on the commercial invoice to avoid being reclassified under Chapter 28, which might carry different regulatory requirements or duty rates. The WCO Explanatory Notes further clarify that this heading includes potassium sulphate whether or not it is pure, provided it is not put up in tablets or similar forms or in packages of a gross weight not exceeding 10 kg.

Covers
  • Agricultural grade potassium sulphate
  • Water-soluble sulfate of potash for fertigation
  • Granular SOP for soil application
  • Standard powder sulfate of potash
  • Potassium sulphate used as a fertilizer supplement
Also under 3104.30
  • K+S Kaliumsulfat
  • Tessenderlo Kerley SOP
  • Compass Minerals SOP
  • SQM SOP
  • ICL Specialty Fertilizers SOP.

Codes often confused with 3104.30

Common mistake. Sulfate of potash is often confused with Muriate of Potash (Potassium Chloride), which is classified under 3104.20. It may also be misclassified under 3105.20 if it is part of a multi-nutrient NPK fertilizer blend. If the potassium sulphate is of high purity for laboratory use, customs may attempt to classify it under 2833.29.

3104.20Fertilizers, mineral or chemical; potassic, potassium chloride3105.20Fertilizers, mineral or chemical; containing the three fertilizing elements nitrogen, phosphorus and potassium2833.29Sulphates; n.e.c. in item no. 2833.2

Top exporters and importers of HS 310430 (the code used for sulfate of potash), 2025

In 2025, the largest exporter of HS 310430 (the code used for sulfate of potash) in UN Comtrade data was Egypt, with 22% of world exports; the largest importer in UN Comtrade data was the United States, with 7.1% 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 310430, not only sulfate of potash.

Top exporters 2025 · share of world exports

  1. 1 Egypt $130M
  2. 2 Taiwan* ~$96M
  3. 3 Sweden $96M

World total: $592M Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

  1. 1 United States $73M
  2. 2 Australia $58M
  3. 3 South Africa $57M

World total: $1.0B 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. UN Comtrade records Taiwan as "Other Asia, not elsewhere specified". Saudi Arabia's exports under that code are left out: they are far too large to be trade with Taiwan, so mostly undisclosed partners. 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 sulfate of potash

Brazil splits HS 3104.30 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 sulfate of potash

What is the HS code for Sulfate of potash?

The HS code for Sulfate of potash is 310430 (Fertilizers, mineral or chemical; potassic, potassium sulphate). The HS code for sulfate of potash (potassium sulphate) is 3104.30.

How do I classify Sulfate of potash for customs?

Sulfate of potash is classified under HS code 310430 — Fertilizers, mineral or chemical; potassic, potassium sulphate. This is a 6-digit subheading level code.

Is SOP classified differently if it is liquid?

If it is a simple aqueous solution of potassium sulphate intended for fertilizer use, it remains under 3104.30, but complex liquid fertilizers fall under 3105.

Which countries are the top exporters of sulfate of potash (HS 310430)?

In 2025, the top exporters of HS 310430 (the code used for sulfate of potash) in UN Comtrade data were Egypt ($130M, 22% of world exports), Taiwan (about $96M) and Sweden ($96M). World exports came to about $592M, 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 sulfate of potash (HS 310430)?

In 2025, the top importers of HS 310430 (the code used for sulfate of potash) in UN Comtrade data were the United States ($73M, 7.1% of world imports), Australia ($58M) and South Africa ($57M). World imports came to about $1.0B, 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 Sulfate of potash the same in all countries?

The base HS code 310430 for Sulfate of potash 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 sulfate of potash in Brazil?

Brazil splits HS 310430 into 2 NCM codes, so the right one for sulfate of potash depends on the product's details: 3104.30.10 (Potassium sulphate, 52% K2O or less), 3104.30.90 (Potassium sulphate, over 52% K2O).