HS Code 25.02 – Iron pyrites; unroasted

HS code 2502 is a 4-digit heading in the Harmonized System that covers: Iron pyrites; unroasted. HS Code 2502 encompasses unroasted iron pyrites, a crucial mineral product within international trade. This heading specifically covers iron sulfides in their natural, unprocessed state, before any roasting or other chemical transformation. Iron pyrites, often referred to as 'fool's gold' due to their metallic luster, are primarily valued for their sulfur content, making them a significant raw material for the production of sulfuric acid, a fundamental industrial chemical. Additionally, after roasting, the residual iron oxide can be used as an iron ore, linking this heading to the broader iron and steel industry. The scope of this classification is narrow, strictly limited to the unroasted form; once roasted, the product falls under different headings, typically related to iron ores or other processed mineral substances. This distinction is vital for customs classification, as it directly impacts tariffs, import duties, and trade regulations. Historically, iron pyrites played a more prominent role as a sulfur source before the widespread availability of elemental sulfur from petroleum refining. Today, while less dominant, it remains a strategic raw material for specific industrial applications, particularly in regions with abundant deposits. Its classification under Chapter 25, which covers 'Salt; Sulphur; Earths and Stone; Plastering Materials, Lime and Cement,' correctly places it among other natural mineral products, emphasizing its raw, unworked state.

Unroasted iron pyrites, natural iron sulfide ore, pyrite lumps, crushed pyrite ore, fine pyrite powder (unroasted), marcasite ore (unroasted), chalcopyrite (unroasted, if primarily for sulfur), arsenopyrite (unroasted, if primarily for sulfur), raw pyrite concentrates, unprocessed pyrite rock, pyrite fines, natural iron disulfide, uncalcined iron pyrites, crude iron pyrites, unprocessed iron sulfide.

A common misclassification error involves confusing unroasted iron pyrites (2502) with roasted pyrites or other iron ores. Roasted iron pyrites, having undergone a chemical transformation, are typically classified under Chapter 26 (Metallic ores, slag and ash), often specifically under heading 2601 for iron ores, which carries different tariff implications. Another mistake is classifying elemental sulfur (2503) or sulfur-containing chemical compounds (Chapter 28) under 2502, even though iron pyrites are a source of sulfur. The key differentiator is the raw, unroasted state of the iron pyrites themselves, not the end product derived from them. Lastly, other iron ores like hematite or magnetite, which are primarily iron-bearing and not sulfur-bearing in the same context, belong to 2601.

In 2025, the top exporters of HS code 2502 in UN Comtrade data were Peru (about $144M, 40% of world exports), Laos (about $99M) and Türkiye ($39M). World exports came to about $363M, 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.

In 2025, the top importers of HS code 2502 in UN Comtrade data were China ($584M, 87% of world imports), Finland ($20M) and Malaysia ($13M). World imports came to about $673M, 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.

HS code 2502 is a 4-digit heading under Chapter 25 of the Harmonized System. The first 2 digits (25) identify the chapter, and digits 3-4 (02) specify the heading. This code contains multiple 6-digit subheadings for precise product classification.