HS code · 6-digit subheading
HS Code 3102.21 – Fertilizers, mineral or chemical; nitrogenous, ammonium sulphate
HS code 3102.21 is the 6-digit subheading for fertilizers, mineral or chemical, nitrogenous, ammonium sulphate. It is used for granular ammonium sulphate, crystalline ammonium sulphate, ammonium sulphate solution and ammonium sulphate blends.
What HS 3102.21 covers
This HS code covers ammonium sulphate, a mineral or chemical nitrogenous fertilizer. It is valued for providing both nitrogen and sulfur, two essential nutrients for plant growth, making it particularly beneficial for crops with high sulfur demands. Ammonium sulphate is often produced as a by-product of various industrial processes, including caprolactam production and steel manufacturing. Its trade involves chemical companies and fertilizer producers exporting to agricultural markets globally. Importers include countries cultivating crops like corn, wheat, and oilseeds. Key aspects include its acidic effect on soil, which can be advantageous in alkaline soils, and its granular or crystalline forms. The inclusion of ammonium sulphate under CBAM highlights the growing focus on the environmental impact of fertilizer production and trade, potentially influencing sourcing decisions and market prices.
- Covers
- Granular ammonium sulphate
- Crystalline ammonium sulphate
- Ammonium sulphate solution
- Ammonium sulphate blends
- Examples
- BASF Ammonium Sulphate
- Nutrien Ammonium Sulphate
- OCI Nitrogen Ammonium Sulphate
- EuroChem Ammonium Sulphate
Codes often confused with 3102.21
Common mistake. Ammonium sulphate can be confused with other nitrogenous fertilizers (e.g., urea 310210) or even industrial chemicals (2833) if its primary use as a fertilizer isn't clearly specified.
Top exporters and importers of HS code 310221, 2025
In 2025, the largest exporter of HS code 310221 in UN Comtrade data was China, with 74% of world exports; the largest importer in UN Comtrade data was Brazil, with 28% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Top exporters 2025 · share of world exports
- 1 China $3.3B 74% of world exports
- 2 Belgium $294M 6.6% of world exports
- 3 Canada $178M 4.0% of world exports
World total: $4.5B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Brazil $1.4B 28% of world imports
- 2 United States $413M 8.1% of world imports
- 3 Türkiye $202M 4.0% of world imports
World total: $5.1B 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 that did not report are estimated from what other countries recorded trading with them. 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 code for 3102.21
Brazil does not split HS 3102.21: its NCM code is 3102.21.00.
All Brazil NCM codes in heading 31.02 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
EU Regulatory Requirements
This product falls under the Carbon Border Adjustment Mechanism (CBAM). Importers to the EU must declare embedded carbon emissions and purchase CBAM certificates.
Questions about HS 3102.21
What is HS code 310221?
HS code 310221 is a 6-digit subheading in the Harmonized System that covers: Fertilizers, mineral or chemical; nitrogenous, ammonium sulphate. This HS code covers ammonium sulphate, a mineral or chemical nitrogenous fertilizer. It is valued for providing both nitrogen and sulfur, two essential nutrients for plant growth, making it particularly beneficial for crops with high sulfur demands. Ammonium sulphate is often produced as a by-product of various industrial processes, including caprolactam production and steel manufacturing. Its trade involves chemical companies and fertilizer producers exporting to agricultural markets globally. Importers include countries cultivating crops like corn, wheat, and oilseeds. Key aspects include its acidic effect on soil, which can be advantageous in alkaline soils, and its granular or crystalline forms. The inclusion of ammonium sulphate under CBAM highlights the growing focus on the environmental impact of fertilizer production and trade, potentially influencing sourcing decisions and market prices.
What products fall under HS code 310221?
Granular ammonium sulphate, crystalline ammonium sulphate, ammonium sulphate solution, ammonium sulphate blends
What are common misclassifications for HS code 310221?
Ammonium sulphate can be confused with other nitrogenous fertilizers (e.g., urea 310210) or even industrial chemicals (2833) if its primary use as a fertilizer isn't clearly specified.
Which countries are the top exporters of goods under HS code 310221?
In 2025, the top exporters of HS code 310221 in UN Comtrade data were China ($3.3B, 74% of world exports), Belgium ($294M) and Canada ($178M). World exports came to about $4.5B, 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 goods under HS code 310221?
In 2025, the top importers of HS code 310221 in UN Comtrade data were Brazil ($1.4B, 28% of world imports), the United States ($413M) and Türkiye ($202M). World imports came to about $5.1B, 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.
How is HS code 310221 structured?
HS code 310221 is a 6-digit subheading under the Harmonized System. The first 2 digits (31) identify the chapter, digits 3-4 (02) identify the heading, and digits 5-6 (21) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 310221?
In Brazil, HS code 310221 is NCM 3102.21.00. The last two digits are 00 because Brazil does not split this HS code further.