Product classification
HS code for Ammonium metavanadate: 2841.90
Salts of oxometallic or peroxometallic acids, n.e.c. in heading no. 2841.
Classification of ammonium metavanadate under HS 2841.90
Ammonium metavanadate is an inorganic salt with the chemical formula NH4VO3. In the context of the Harmonized System (HS), it is classified under Chapter 28, which covers inorganic chemicals, precious metal compounds, and radioactive elements. Specifically, it is placed under heading 2841, which is dedicated to salts of oxometallic or peroxometallic acids. The classification process follows the General Rules for the Interpretation (GRI) of the Harmonized System. GRI 1 dictates that classification is determined by the terms of the headings and any relative section or chapter notes. Since ammonium metavanadate is a salt of vanadic acid, which is an oxometallic acid, it naturally falls into heading 2841. However, because there is no specific subheading for vanadates (unlike aluminates or tungstates), it is categorized under the residual subheading 2841.90, which covers \"other\" salts of oxometallic acids. This product typically appears as a white-to-yellowish crystalline powder and is highly valued in industrial applications. It serves as a primary catalyst in the synthesis of organic compounds and is a crucial intermediate in the production of vanadium pentoxide. Its classification is strictly based on its chemical identity as a separate chemically defined compound, as per Note 1 to Chapter 28, which requires the substance to be a single chemical element or a single chemically defined compound, whether or not containing impurities.
- Covers
- High-purity ammonium metavanadate (99.9%+)
- Technical grade ammonium metavanadate
- Ammonium metavanadate powder
- Ammonium metavanadate crystalline form
- Reagent grade NH4VO3
- Also under 2841.90
- Sigma-Aldrich Vanadates
- Alfa Aesar Niobates
- American Elements Tantalates
- Merck Specialty Salts
Codes often confused with 2841.90
Common mistake. Ammonium metavanadate is frequently misclassified under HS code 2825.30, which covers vanadium oxides and hydroxides. While it is a precursor to these oxides, the salt form must remain in 2841.90. Another common error is using HS code 2842.90, which is for other salts of inorganic acids; however, because vanadates are specifically salts of oxometallic acids, heading 2841 takes precedence over 2842. Additionally, some importers mistakenly use 3102.90 if they believe the product is a nitrogenous fertilizer, but ammonium metavanadate lacks the agricultural properties required for Chapter 31.
Top exporters and importers of HS 284190 (the code used for ammonium metavanadate), 2025
In 2025, the largest exporter of HS 284190 (the code used for ammonium metavanadate) in UN Comtrade data was South Korea, with 67% of world exports; the largest importer in UN Comtrade data was South Korea, with 33% of world imports. The United Kingdom reports $3.0B of its chapter 28 exports without product detail (confidential), so it may also belong among the top exporters.
Figures cover everything classified under HS 284190, not only ammonium metavanadate.
Top exporters 2025 · share of world exports
- 1 South Korea $5.0B 67% of world exports
- 2 Japan $1.9B 25% of world exports
- 3 China $153M 2.0% of world exports
The United Kingdom reports $3.0B of its chapter 28 exports without product detail (confidential), so it may also belong among the top exporters.
World total: $7.5B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 South Korea $1.5B 33% of world imports
- 2 Poland $1.1B 23% of world imports
- 3 Japan $428M 9.4% of world imports
World total: $4.5B 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 metavanadate
Brazil splits HS 2841.90 into 22 NCM codes. Pick the one that matches your product:
- 2841.90.11Lead titanate
- 2841.90.12Barium or bismuth titanate
- 2841.90.13Calcium or strontium titanate
- 2841.90.14Magnesium titanate
- 2841.90.15Lanthanum or neodymium titanate
- 2841.90.19Other titanates
- 2841.90.21Barium ferrite
- 2841.90.22Strontium ferrite
- 2841.90.29Other ferrites and ferrates
- 2841.90.30Vanadates
- 2841.90.41Barium stannate
- 2841.90.42Bismuth stannate
- 2841.90.43Calcium stannate
- 2841.90.49Other stannates
- 2841.90.50Plumbates
- 2841.90.60Antimonates
- 2841.90.70Zincates
- 2841.90.81Sodium aluminate
- 2841.90.82Magnesium aluminate
- 2841.90.83Bismuth aluminate
- 2841.90.89Other aluminates
- 2841.90.90Other salts of oxometallic or peroxometallic acids
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about ammonium metavanadate
What is the HS code for Ammonium metavanadate?
The HS code for Ammonium metavanadate is 284190 (Salts of oxometallic or peroxometallic acids; n.e.c. in heading no. 2841). The HS code for ammonium metavanadate is 2841.90, which refers to salts of oxometallic or peroxometallic acids not elsewhere specified.
How do I classify Ammonium metavanadate for customs?
Ammonium metavanadate is classified under HS code 284190 — Salts of oxometallic or peroxometallic acids; n.e.c. in heading no. 2841. This is a 6-digit subheading level code.
Is ammonium metavanadate considered a hazardous material for shipping?
Yes, it is generally classified as a toxic substance (Class 6.1) for transport purposes, which requires specific labeling and documentation alongside the HS code declaration.
Which countries are the top exporters of ammonium metavanadate (HS 284190)?
In 2025, the top exporters of HS 284190 (the code used for ammonium metavanadate) in UN Comtrade data were South Korea ($5.0B, 67% of world exports), Japan ($1.9B) and China ($153M). World exports came to about $7.5B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). The United Kingdom reports $3.0B of its chapter 28 exports without product detail (confidential), so it may also belong among the top exporters.
Which countries are the top importers of ammonium metavanadate (HS 284190)?
In 2025, the top importers of HS 284190 (the code used for ammonium metavanadate) in UN Comtrade data were South Korea ($1.5B, 33% of world imports), Poland ($1.1B) and Japan ($428M). World imports 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.
Is the HS code for Ammonium metavanadate the same in all countries?
The base HS code 284190 for Ammonium metavanadate 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 metavanadate in Brazil?
Brazil splits HS 284190 into 22 NCM codes, so the right one for ammonium metavanadate depends on the product's details: 2841.90.11 (Lead titanate), 2841.90.12 (Barium or bismuth titanate), 2841.90.13 (Calcium or strontium titanate), 2841.90.14 (Magnesium titanate), 2841.90.15 (Lanthanum or neodymium titanate), 2841.90.19 (Other titanates), and more.