HS code · 6-digit subheading
HS Code 2811.29 – Inorganic oxygen compounds; of non-metals, n.e.c. in item no. 2811.2
HS code 2811.29 is the 6-digit subheading for inorganic oxygen compounds, of non-metals, n.e.c. in item no. 2811.2. It is used for sulfur dioxide, sulfur trioxide, nitrous oxide, nitrogen dioxide and dinitrogen tetroxide.
What HS 2811.29 covers
This "basket" HS code captures a variety of inorganic oxygen compounds of non-metals that are not specifically classified elsewhere within heading 2811.2. This includes compounds like sulfur dioxide, sulfur trioxide, and various nitrogen oxides, which are crucial intermediates or end-products in the chemical industry. These compounds are vital for manufacturing sulfuric acid, nitric acid, and other industrial chemicals, as well as for use in environmental applications like gas scrubbing. Major chemical producers and countries with significant industrial bases, such as China, the United States, Germany, and India, are key players in their import and export. Trade in these often-hazardous gases requires strict adherence to international safety and environmental regulations, including specialized transportation and storage. The specific chemical properties and purity levels are paramount for their intended industrial applications.
- Covers
- Sulfur dioxide
- Sulfur trioxide
- Nitrous oxide
- Nitrogen dioxide
- Dinitrogen tetroxide
- Ozone (chemically pure)
- Carbon monoxide
- Examples
- BASF Sulfur Dioxide
- Linde Nitrous Oxide
- Air Liquide Carbon Monoxide
- Solvay Sulfur Trioxide
Codes often confused with 2811.29
Common mistake. This code is a residual category, so misclassification often occurs when a more specific code exists within 2811.2 (like 2811.21 for CO2 or 2811.22 for SiO2) or other chapters for specific non-metal oxides.
Top exporters and importers of HS code 281129, 2025
In 2025, the largest exporter of HS code 281129 in UN Comtrade data was China, with 20% of world exports; the largest importer in UN Comtrade data was Germany, with 17% of world imports. The United Kingdom reports $2.7B of its chapter 28 imports without product detail (confidential), so its figure here may be too low and it may rank higher.
Top exporters 2025 · share of world exports
- 1 China $123M 20% of world exports
- 2 Germany $110M 18% of world exports
- 3 Poland $96M 16% of world exports
World total: $611M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Germany $98M 17% of world imports
- 2 United States $64M 11% of world imports
- 3 United Kingdom $62M 10% of world imports
The United Kingdom reports $2.7B of its chapter 28 imports without product detail (confidential), so its figure here may be too low and it may rank higher.
World total: $591M 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 2811.29 2
Brazil splits HS 2811.29 into 2 NCM codes, Mercosur's 8-digit tariff lines.
- 2811.29.10 Sulphur dioxideDióxido de enxofre
- 2811.29.90 Other inorganic oxygen compounds of non-metalsOutros
All Brazil NCM codes in heading 28.11 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
Questions about HS 2811.29
What is HS code 281129?
HS code 281129 is a 6-digit subheading in the Harmonized System that covers: Inorganic oxygen compounds; of non-metals, n.e.c. in item no. 2811.2. This "basket" HS code captures a variety of inorganic oxygen compounds of non-metals that are not specifically classified elsewhere within heading 2811.2. This includes compounds like sulfur dioxide, sulfur trioxide, and various nitrogen oxides, which are crucial intermediates or end-products in the chemical industry. These compounds are vital for manufacturing sulfuric acid, nitric acid, and other industrial chemicals, as well as for use in environmental applications like gas scrubbing. Major chemical producers and countries with significant industrial bases, such as China, the United States, Germany, and India, are key players in their import and export. Trade in these often-hazardous gases requires strict adherence to international safety and environmental regulations, including specialized transportation and storage. The specific chemical properties and purity levels are paramount for their intended industrial applications.
What products fall under HS code 281129?
Sulfur dioxide, Sulfur trioxide, Nitrous oxide, Nitrogen dioxide, Dinitrogen tetroxide, Ozone (chemically pure), Carbon monoxide
What are common misclassifications for HS code 281129?
This code is a residual category, so misclassification often occurs when a more specific code exists within 2811.2 (like 2811.21 for CO2 or 2811.22 for SiO2) or other chapters for specific non-metal oxides.
Which countries are the top exporters of goods under HS code 281129?
In 2025, the top exporters of HS code 281129 in UN Comtrade data were China ($123M, 20% of world exports), Germany ($110M) and Poland ($96M). World exports came to about $611M, 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 goods under HS code 281129?
In 2025, the top importers of HS code 281129 in UN Comtrade data were Germany ($98M, 17% of world imports), the United States ($64M) and the United Kingdom ($62M). World imports came to about $591M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). The United Kingdom reports $2.7B of its chapter 28 imports without product detail (confidential), so its figure here may be too low and it may rank higher.
How is HS code 281129 structured?
HS code 281129 is a 6-digit subheading under the Harmonized System. The first 2 digits (28) identify the chapter, digits 3-4 (11) identify the heading, and digits 5-6 (29) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 281129?
Brazil splits HS code 281129 into 2 NCM codes: 2811.29.10 (Sulphur dioxide), 2811.29.90 (Other inorganic oxygen compounds of non-metals). The first 6 digits of each match the HS code.