Product classification
HS code for Ammonium sulfate fertilizer: 3102.21
Fertilizers, mineral or chemical, nitrogenous, ammonium sulphate.
Classification of ammonium sulfate fertilizer under HS 3102.21
Ammonium sulfate, when specifically prepared and presented as a fertilizer, is classified under HS Chapter 31, which is dedicated to fertilizers. Within this chapter, heading 3102 covers "Mineral or chemical fertilizers, nitrogenous". Subheading 3102.21 is explicitly designated for "Ammonium sulphate". This classification is precise because the product is chemically ammonium sulfate and its intended use is as a fertilizer, aligning perfectly with both the chemical identity and the functional purpose described in the HS nomenclature. This distinction based on use is critical for correct classification.
- Covers
- Granular ammonium sulfate fertilizer
- Crystalline ammonium sulfate fertilizer
- Blended fertilizers where ammonium sulfate is the primary nitrogen component
- Ammonium sulfate solutions for agricultural application
- Also under 3102.21
- BASF Ammonium Sulphate
- Nutrien Ammonium Sulphate
- OCI Nitrogen Ammonium Sulphate
- EuroChem Ammonium Sulphate
Codes often confused with 3102.21
Common mistake. A common misclassification involves distinguishing between ammonium sulfate as an industrial chemical and as a fertilizer. If ammonium sulfate is not presented or intended for use as a fertilizer, it would be classified under HS code 2833.29 as an inorganic chemical, specifically "Other sulphates". The distinction hinges entirely on the product's primary intended use and its presentation (e.g., packaging, marketing). Another potential confusion could be with other nitrogenous fertilizers, such as urea (3102.10) or ammonium nitrate (3102.30). However, the specific chemical identity of ammonium sulfate directs it unambiguously to 3102.21 when it functions as a fertilizer.
Top exporters and importers of HS 310221 (the code used for ammonium sulfate fertilizer), 2025
In 2025, the largest exporter of HS 310221 (the code used for ammonium sulfate fertilizer) 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.
Figures cover everything classified under HS 310221, not only ammonium sulfate fertilizer.
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 ammonium sulfate fertilizer
Brazil classifies ammonium sulfate fertilizer under NCM 3102.21.00: HS 3102.21 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
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 ammonium sulfate fertilizer
What is the HS code for Ammonium sulfate fertilizer?
The HS code for Ammonium sulfate fertilizer is 310221 (Fertilizers, mineral or chemical; nitrogenous, ammonium sulphate). The HS code for Ammonium sulfate fertilizer is 310221.
How do I classify Ammonium sulfate fertilizer for customs?
Ammonium sulfate fertilizer is classified under HS code 310221 — Fertilizers, mineral or chemical; nitrogenous, ammonium sulphate. This is a 6-digit subheading level code.
How does the HS code differentiate between ammonium sulfate as a chemical and as a fertilizer?
The HS code differentiates based on the product's primary intended use and presentation. If ammonium sulfate is prepared, marketed, and packaged for agricultural purposes as a nutrient source, it falls under Chapter 31 (Fertilizers). If it is an industrial chemical for other applications (e.g., water treatment, food additive), it is classified under Chapter 28 (Inorganic Chemicals).
Which countries are the top exporters of ammonium sulfate fertilizer (HS 310221)?
In 2025, the top exporters of HS 310221 (the code used for ammonium sulfate fertilizer) 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 ammonium sulfate fertilizer (HS 310221)?
In 2025, the top importers of HS 310221 (the code used for ammonium sulfate fertilizer) 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.
Is the HS code for Ammonium sulfate fertilizer the same in all countries?
The base HS code 310221 for Ammonium sulfate 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 ammonium sulfate fertilizer in Brazil?
In Brazil, ammonium sulfate fertilizer (HS 310221) is classified under NCM 3102.21.00.