Product classification

HS code for Sodium tungstate: 2841.80

Salts, tungstates (wolframates).

Classification of sodium tungstate under HS 2841.80

Sodium tungstate is classified under HS code 2841.80. This classification falls under heading 2841, which encompasses salts of oxometallic or peroxometallic acids. The Harmonized System organizes these salts based on the metal present in the anion. Subheading 2841.80 is specifically allocated for tungstates (also known as wolframates). Sodium tungstate (Na2WO4) is the most common commercial form of these salts. The classification is determined by GRI 1 and GRI 6. GRI 1 directs us to the heading 2841 based on the chemical nature of the salt, and GRI 6 allows for the use of the specific subheading 2841.80 for tungstates. This product is primarily used as an intermediate in the recovery of tungsten from its ores and as a reagent in analytical chemistry. It is also used in the textile industry as a fireproofing agent and in organic chemistry as a catalyst for oxidation reactions. It is important to ensure the product is a separate chemically defined compound; if it were an ore or a concentrate, it would be classified in Chapter 26.

Covers
  • Sodium tungstate dihydrate
  • Anhydrous sodium tungstate
  • Sodium orthotungstate
  • Technical grade sodium tungstate
  • Sodium tungstate solution (pure)
Also under 2841.80
  • Xiamen Tungsten
  • Global Tungsten & Powders (GTP)
  • H.C. Starck Tungsten
  • Sigma-Aldrich Tungstates

Codes often confused with 2841.80

Common mistake. Sodium tungstate (2841.80) is sometimes misclassified under 2841.90, which is the residual category for \"Other\" oxometallic salts. However, because tungstates are specifically named in subheading 2841.80, that code must take precedence. Another common error involves confusing sodium tungstate with tungsten ores or concentrates, which are classified under 2611.00. Ores are naturally occurring minerals, whereas sodium tungstate is a chemically processed salt. Additionally, sodium tungstate should not be confused with sodium molybdate (2841.70). While tungsten and molybdenum are in the same group of the periodic table and their salts have similar properties, the HS system provides distinct subheadings for each. Finally, if sodium tungstate is part of a prepared catalyst, it should be classified under heading 3815.

2841.90Salts of oxometallic or peroxometallic acids; n.e.c. in heading no. 28412611.00Tungsten ores and concentrates2841.70Salts; molybdates38.15Reaction initiators, reaction accelerators and catalytic preparations n.e.c. or included

Top exporters and importers of HS 284180 (the code used for sodium tungstate), 2025

In 2025, the largest exporter of HS 284180 (the code used for sodium tungstate) in UN Comtrade data was China, with 48% of world exports; the largest importer in UN Comtrade data was the United States, with 36% of world imports. Taiwan did not report 2025 data, and its estimate from partner records misses its trade with other countries that did not report: in 2024 that was 5.7% of its exports here ($2.5M, CEPII BACI), so it may rank higher.

Figures cover everything classified under HS 284180, not only sodium tungstate.

Top exporters 2025 · share of world exports

  1. 1 China $116M
  2. 2 South Korea $35M
  3. 3 Taiwan* ~$34M

Taiwan did not report 2025 data, and its estimate from partner records misses its trade with other countries that did not report: in 2024 that was 5.7% of its exports here ($2.5M, CEPII BACI), so it may rank higher.

World total: $241M Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

  1. 1 United States $99M
  2. 2 China $46M
  3. 3 Japan $43M

World total: $273M 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 marked * did not, so their figures add up what other countries recorded trading with them, and their exports are valued at buyers' CIF prices. 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. UN Comtrade records Taiwan as "Other Asia, not elsewhere specified". Saudi Arabia's exports under that code are left out: they are far too large to be trade with Taiwan, so mostly undisclosed partners. 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 sodium tungstate

Brazil splits HS 2841.80 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 sodium tungstate

What is the HS code for Sodium tungstate?

The HS code for Sodium tungstate is 284180 (Salts; tungstates (wolframates)). The HS code for sodium tungstate is 2841.80, which covers tungstates (wolframates).

How do I classify Sodium tungstate for customs?

Sodium tungstate is classified under HS code 284180 — Salts; tungstates (wolframates). This is a 6-digit subheading level code.

Is sodium tungstate dihydrate classified differently than the anhydrous form?

No, both the dihydrate and anhydrous forms of sodium tungstate are classified under HS code 2841.80 as they are both chemically defined tungstate salts.

Which countries are the top exporters of sodium tungstate (HS 284180)?

In 2025, the top exporters of HS 284180 (the code used for sodium tungstate) in UN Comtrade data were China ($116M, 48% of world exports), South Korea ($35M) and Taiwan (about $34M). World exports came to about $241M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Taiwan did not report 2025 data, and its estimate from partner records misses its trade with other countries that did not report: in 2024 that was 5.7% of its exports here ($2.5M, CEPII BACI), so it may rank higher.

Which countries are the top importers of sodium tungstate (HS 284180)?

In 2025, the top importers of HS 284180 (the code used for sodium tungstate) in UN Comtrade data were the United States ($99M, 36% of world imports), China ($46M) and Japan ($43M). World imports came to about $273M, 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 Sodium tungstate the same in all countries?

The base HS code 284180 for Sodium tungstate 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 sodium tungstate in Brazil?

Brazil splits HS 284180 into 3 NCM codes, so the right one for sodium tungstate depends on the product's details: 2841.80.10 (Ammonium tungstate (wolframate)), 2841.80.20 (Lead tungstate (wolframate)), 2841.80.90 (Other tungstates (wolframates)).