Product classification

HS code for Ammonium molybdate: 2841.70

Salts, molybdates.

Classification of ammonium molybdate under HS 2841.70

Ammonium molybdate is an inorganic chemical compound classified under HS code 284170, which specifically covers "Salts; molybdates." Chapter 28 of the Harmonized System is dedicated to "Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes." Within this chapter, heading 2841 covers "Salts of oxometallic or peroxometallic acids (other than silicates), n.e.c." Ammonium molybdate, being a salt of molybdic acid, fits precisely into this category. The subheading 284170 further specifies "Molybdates," ensuring accurate classification for this compound based on its chemical nature as an inorganic salt containing the molybdate anion. This classification provides a clear and consistent global trade identifier.

Covers
  • Ammonium dimolybdate
  • Ammonium heptamolybdate (ammonium paramolybdate)
  • Ammonium tetramolybdate
  • Ammonium octamolybdate
  • Purified ammonium molybdate
  • Technical grade ammonium molybdate
Also under 2841.70
  • Climax Molybdenum (a Freeport-McMoRan company)
  • Molymet
  • China Molybdenum
  • Sigma-Aldrich Molybdates

Codes often confused with 2841.70

Common mistake. Common misclassifications for ammonium molybdate often involve other inorganic compounds or products with similar applications. HS code 2825, covering "Hydrazines and hydroxylamines and their inorganic salts; other inorganic bases; other metal oxides, hydroxides and peroxides," is sometimes confused. However, 2825 is for different types of inorganic compounds and does not specifically cover molybdates, making 284170 the more precise classification. Another potential misclassification is with HS code 3105, which covers "Mineral or chemical fertilizers containing two or three of the fertilizing elements nitrogen, phosphorus and potassium; other fertilizers." While ammonium molybdate can be used as a micronutrient in fertilizers, its primary classification is as an inorganic chemical compound. If specifically prepared and marketed as a fertilizer, it might fall under Chapter 31, but its fundamental chemical identity places it in Chapter 28.

28.25Hydrazine and hydroxylamine and their inorganic salts; other inorganic bases; other metal oxides, hydroxides and peroxides31.05Fertilizers; mineral or chemical, containing 2 or 3 of the elements nitrogen, phosphorus, potassium; other fertilisers; goods of chapter 31 in tablets or packages of gross weight not exceeding 10kg

Top exporters and importers of HS 284170 (the code used for ammonium molybdate), 2025

In 2025, the largest exporter of HS 284170 (the code used for ammonium molybdate) in UN Comtrade data was the Netherlands, with 22% of world exports; the largest importer in UN Comtrade data was Denmark, with 21% 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 284170, not only ammonium molybdate.

Top exporters 2025 · share of world exports

  1. 1 Netherlands $61M
  2. 2 United States $53M
  3. 3 India $45M

World total: $275M Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

  1. 1 Denmark $71M
  2. 2 China $62M
  3. 3 United States $24M

World total: $334M 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 ammonium molybdate

Brazil splits HS 2841.70 into 3 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 ammonium molybdate

What is the HS code for Ammonium molybdate?

The HS code for Ammonium molybdate is 284170 (Salts; molybdates). The HS code for Ammonium molybdate is 284170, which specifically covers "Salts; molybdates."

How do I classify Ammonium molybdate for customs?

Ammonium molybdate is classified under HS code 284170 — Salts; molybdates. This is a 6-digit subheading level code.

Is ammonium molybdate considered a fertilizer?

Ammonium molybdate can function as a micronutrient in fertilizers due to its molybdenum content. However, its primary classification based on its chemical composition is under HS code 284170 as an inorganic chemical salt. If specifically formulated and presented as a fertilizer, it might be classified under Chapter 31, but its fundamental chemical identity remains in Chapter 28.

Which countries are the top exporters of ammonium molybdate (HS 284170)?

In 2025, the top exporters of HS 284170 (the code used for ammonium molybdate) in UN Comtrade data were the Netherlands ($61M, 22% of world exports), the United States ($53M) and India ($45M). World exports came to about $275M, 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 molybdate (HS 284170)?

In 2025, the top importers of HS 284170 (the code used for ammonium molybdate) in UN Comtrade data were Denmark ($71M, 21% of world imports), China ($62M) and the United States ($24M). World imports came to about $334M, 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 molybdate the same in all countries?

The base HS code 284170 for Ammonium molybdate 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 molybdate in Brazil?

Brazil splits HS 284170 into 3 NCM codes, so the right one for ammonium molybdate depends on the product's details: 2841.70.10 (Ammonium molybdate), 2841.70.20 (Sodium molybdate), 2841.70.90 (Other molybdates).