Product classification

HS code for Ferrous sulphate: 2833.29

Sulphates, n.e.c. in item no. 2833.2.

Classification of ferrous sulphate under HS 2833.29

Ferrous sulphate, also known as iron(II) sulphate, is classified under HS code 2833.29. This classification is found within Chapter 28 (Inorganic chemicals), specifically under heading 2833 which covers sulphates, alums, and peroxosulphates. Subheading 2833.29 is the residual category for "other" sulphates not specifically listed elsewhere (such as those of magnesium, aluminum, nickel, or copper). Ferrous sulphate is commonly found in various hydration states, most notably the heptahydrate (green vitriol) and the monohydrate. The classification is based on the chemical structure of the salt, consisting of iron and sulphate ions. It is widely used in water treatment, as a soil amendment, and in the manufacture of inks and pigments, but its primary classification remains tied to its identity as an inorganic sulphate.

Covers
  • Ferrous sulphate heptahydrate (Green Vitriol)
  • Ferrous sulphate monohydrate
  • Dried ferrous sulphate
  • Technical grade iron(II) sulphate for industrial use
  • Ferrous sulphate used as a coagulant in water treatment
Also under 2833.29
  • Epsom Salt (various brands)
  • Miraclo (fertilizer)
  • Blue Vitriol (copper sulphate)
  • Alum (aluminium sulphate in some contexts)

Codes often confused with 2833.29

Common mistake. Ferrous sulphate is often misclassified under 3105.90, which covers other fertilizers. While it is used to treat iron chlorosis in plants, it is technically a soil amendment or a chemical rather than a complete fertilizer unless mixed with NPK components. It is also frequently confused with 2833.25 (copper sulphates) or 2835.29 (ferric phosphate) due to similar naming conventions in industrial shipping. Another potential error is 3824.99 (chemical products not elsewhere specified), but since ferrous sulphate is a chemically defined inorganic salt, Chapter 28 must be used according to the Chapter 28 Note 1.

3105.90Fertilizers, mineral or chemical; n.e.c. in heading no. 31052833.25Sulphates; of copper2835.29Phosphates; (other than of mono- or disodium, other than of potassium or of calcium hydrogenorthophosphate (dicalcium phosphate) and excluding other phosphates of calcium), whether or not chemically defined3824.99Chemical products, mixtures and preparations; n.e.c. heading 3824

Top exporters and importers of HS 283329 (the code used for ferrous sulphate), 2025

In 2025, the largest exporter of HS 283329 (the code used for ferrous sulphate) in UN Comtrade data was China, with 32% of world exports; the largest importer in UN Comtrade data was China, with 19% 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 283329, not only ferrous sulphate.

Top exporters 2025 · share of world exports

  1. 1 China $527M
  2. 2 Chile $213M
  3. 3 Indonesia $104M

World total: $1.7B Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

  1. 1 China $345M
  2. 2 Japan $184M
  3. 3 United States $183M

World total: $1.8B 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 codes for ferrous sulphate

Brazil splits HS 2833.29 into 8 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 ferrous sulphate

What is the HS code for Ferrous sulphate?

The HS code for Ferrous sulphate is 283329 (Sulphates; n.e.c. in item no. 2833.2). The HS code for ferrous sulphate is 2833.29.

How do I classify Ferrous sulphate for customs?

Ferrous sulphate is classified under HS code 283329 — Sulphates; n.e.c. in item no. 2833.2. This is a 6-digit subheading level code.

Does the hydration state change the HS code?

No, whether it is the monohydrate or heptahydrate form, the product remains classified under 2833.29 as an inorganic sulphate of iron.

Which countries are the top exporters of ferrous sulphate (HS 283329)?

In 2025, the top exporters of HS 283329 (the code used for ferrous sulphate) in UN Comtrade data were China ($527M, 32% of world exports), Chile ($213M) and Indonesia ($104M). World exports came to about $1.7B, 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 ferrous sulphate (HS 283329)?

In 2025, the top importers of HS 283329 (the code used for ferrous sulphate) in UN Comtrade data were China ($345M, 19% of world imports), Japan ($184M) and the United States ($183M). World imports came to about $1.8B, 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 Ferrous sulphate the same in all countries?

The base HS code 283329 for Ferrous sulphate 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 ferrous sulphate in Brazil?

Brazil splits HS 283329 into 8 NCM codes, so the right one for ferrous sulphate depends on the product's details: 2833.29.10 (Antimony sulphate), 2833.29.20 (Lithium sulphate), 2833.29.30 (Strontium sulphate), 2833.29.40 (Ferrous sulphate), 2833.29.50 (Neutral lead sulphate), 2833.29.60 (Chromium sulphate), and more.