Product classification

HS code for Glauber's salt: 2833.11

Sodium sulphates, disodium sulphate.

Classification of glauber's salt under HS 2833.11

Glauber's salt, the decahydrate form of disodium sulphate (Na2SO4·10H2O), is classified under HS code 2833.11. This classification falls within Chapter 28, which covers inorganic chemicals and compounds of precious metals. Heading 2833 is designated for sulphates, alums, and peroxosulphates. Subheading 2833.11 specifically identifies disodium sulphate. The classification is based on the chemical identity of the substance as a salt of sulphuric acid. Glauber's salt is a common commercial form of sodium sulphate, appearing as large, colorless crystals that are highly soluble in water. It is widely used in the textile industry for dyeing, in the manufacture of detergents, and in the Kraft process of wood pulp manufacture. Because it is a chemically defined compound, it must be classified in Chapter 28 regardless of whether it is in its anhydrous form or its hydrated form (Glauber's salt). The Harmonized System groups these together under 2833.11 because they share the same base chemical structure of disodium sulphate, differing only in the presence of water of crystallization.

Covers
  • Glauber's salt (Sodium sulphate decahydrate)
  • Anhydrous sodium sulphate
  • Crystallized disodium sulphate
  • Salt cake (crude sodium sulphate)
  • Mirabilite (when refined as a chemical product)
Also under 2833.11
  • BASF Sodium Sulphate
  • Solvay Sodium Sulphate
  • Merck Sodium Sulphate
  • PQ Corporation Sodium Sulphate

Codes often confused with 2833.11

Common mistake. Glauber's salt is sometimes misclassified under 2501.00 if it is confused with common table salt (sodium chloride). It may also be confused with 2833.19, which covers other sodium sulphates such as sodium hydrogen sulphate (sodium bisulphate). Another common error is attempting to classify it under 3104 if it is intended for use as a fertilizer, but as a pure chemical sulphate, 2833.11 remains the correct and more specific code.

2501.00Salt (including table salt and denatured salt); pure sodium chloride whether or not in aqueous solution; sea water2833.19Sodium sulphates; other than disodium sulphate31.04Fertilizers; mineral or chemical, potassic

Top exporters and importers of HS 283311 (the code used for glauber's salt), 2025

In 2025, the largest exporter of HS 283311 (the code used for glauber's salt) in UN Comtrade data was China, with 52% of world exports; the largest importer in UN Comtrade data was Brazil, with 12% 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 283311, not only glauber's salt.

Top exporters 2025 · share of world exports

  1. 1 China $246M
  2. 2 Spain $131M
  3. 3 India $20M

World total: $473M Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

  1. 1 Brazil $78M
  2. 2 Bangladesh* ~$35M
  3. 3 Colombia $33M

World total: $651M 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. 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 glauber's salt

Brazil splits HS 2833.11 into 2 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 glauber's salt

What is the HS code for Glauber's salt?

The HS code for Glauber's salt is 283311 (Sodium sulphates; disodium sulphate). The HS code for Glauber's salt, which is chemically disodium sulphate, is 2833.11.

How do I classify Glauber's salt for customs?

Glauber's salt is classified under HS code 283311 — Sodium sulphates; disodium sulphate. This is a 6-digit subheading level code.

Is anhydrous sodium sulphate classified differently than Glauber's salt?

No, both the anhydrous form and the hydrated form (Glauber's salt) are classified under the same HS code, 2833.11, as they are both forms of disodium sulphate.

Which countries are the top exporters of glauber's salt (HS 283311)?

In 2025, the top exporters of HS 283311 (the code used for glauber's salt) in UN Comtrade data were China ($246M, 52% of world exports), Spain ($131M) and India ($20M). World exports came to about $473M, 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 glauber's salt (HS 283311)?

In 2025, the top importers of HS 283311 (the code used for glauber's salt) in UN Comtrade data were Brazil ($78M, 12% of world imports), Bangladesh (about $35M) and Colombia ($33M). World imports came to about $651M, 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 Glauber's salt the same in all countries?

The base HS code 283311 for Glauber's salt 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 glauber's salt in Brazil?

Brazil splits HS 283311 into 2 NCM codes, so the right one for glauber's salt depends on the product's details: 2833.11.10 (Anhydrous disodium sulphate), 2833.11.90 (Other disodium sulphate).