Product classification
HS code for Borax anhydrous: 2840.11
Borates, disodium tetraborate (refined borax), anhydrous.
Classification of borax anhydrous under HS 2840.11
Borax anhydrous is classified under HS code 2840.11. This code is part of Chapter 28, which encompasses inorganic chemicals and precious metal compounds. Specifically, heading 2840 covers borates and peroxoborates. The subheading 2840.11 is dedicated to disodium tetraborate (refined borax) that has been processed to remove all water of crystallization. This dehydration process distinguishes it from other forms of borax. To qualify for this code, the product must be a refined chemical compound rather than a crude mineral. The anhydrous form is highly valued in industrial applications such as glass manufacturing, ceramics, and metallurgy because it does not release water vapor when heated, ensuring a more stable chemical reaction and reducing energy consumption during melting processes. The classification is strictly based on the chemical purity and the absence of water molecules in the crystal lattice.
- Covers
- Dehydrated disodium tetraborate
- Calcined refined borax
- Anhydrous sodium borate powder
- Fused borax for metallurgical flux
- Also under 2840.11
- Borax Anhydrous (Rio Tinto)
- US Borax Anhydrous
- Eti Maden Anhydrous Borax
Codes often confused with 2840.11
Common mistake. A common point of confusion is between HS code 2840.11 and HS code 2528.00. Code 2528 covers natural borates and concentrates thereof, whether or not calcined. If the borax is a crude mineral product that has only been minimally processed (e.g., by evaporation or heat to remove water), it belongs in Chapter 25. However, if it has been chemically refined to a high degree of purity, it must be classified in Chapter 28 under 2840.11. Another error is misclassifying it under 2840.19, which is reserved for hydrated forms. Importers must verify the water content; if the product is truly anhydrous (zero water of crystallization), 2840.11 is the only correct choice.
Top exporters and importers of HS 284011 (the code used for borax anhydrous), 2025
In 2025, the largest exporter of HS 284011 (the code used for borax anhydrous) in UN Comtrade data was the United States, with 43% of world exports; the largest importer in UN Comtrade data was China, with 27% 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 284011, not only borax anhydrous.
Top exporters 2025 · share of world exports
- 1 United States $42M 43% of world exports
- 2 Türkiye $40M 41% of world exports
- 3 Netherlands $10.0M 10% of world exports
World total: $96M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 China $26M 27% of world imports
- 2 Netherlands $12M 13% of world imports
- 3 Belgium $8.5M 9.0% of world imports
World total: $95M 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 code for borax anhydrous
Brazil classifies borax anhydrous under NCM 2840.11.00: HS 2840.11 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about borax anhydrous
What is the HS code for Borax anhydrous?
The HS code for Borax anhydrous is 284011 (Borates; disodium tetraborate (refined borax), anhydrous).
How do I classify Borax anhydrous for customs?
Borax anhydrous is classified under HS code 284011 — Borates; disodium tetraborate (refined borax), anhydrous. This is a 6-digit subheading level code.
What is the HS code for anhydrous borax?
The HS code for refined anhydrous borax (disodium tetraborate) is 2840.11.
What is the difference between 2840.11 and 2528.00?
HS code 2840.11 is for chemically refined borax, whereas 2528.00 is for natural, crude borates that have not undergone significant chemical processing beyond concentration or basic calcination.
Which countries are the top exporters of borax anhydrous (HS 284011)?
In 2025, the top exporters of HS 284011 (the code used for borax anhydrous) in UN Comtrade data were the United States ($42M, 43% of world exports), Türkiye ($40M) and the Netherlands ($10.0M). World exports came to about $96M, 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 borax anhydrous (HS 284011)?
In 2025, the top importers of HS 284011 (the code used for borax anhydrous) in UN Comtrade data were China ($26M, 27% of world imports), the Netherlands ($12M) and Belgium ($8.5M). World imports came to about $95M, 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 Borax anhydrous the same in all countries?
The base HS code 284011 for Borax anhydrous 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 borax anhydrous in Brazil?
In Brazil, borax anhydrous (HS 284011) is classified under NCM 2840.11.00.