HS code · 6-digit subheading
HS Code 2825.90 – Inorganic bases, metal oxides, hydroxides and peroxides; n.e.c. in heading no. 2825
HS code 2825.90 is the 6-digit subheading for inorganic bases, metal oxides, hydroxides and peroxides, n.e.c. in heading no. 2825. It is used for barium oxide, strontium oxide, lithium hydroxide, magnesium peroxide and calcium peroxide.
What HS 2825.90 covers
This 'not elsewhere specified' (n.e.c.) category within heading 2825 acts as a residual classification for various inorganic bases, metal oxides, hydroxides, and peroxides that do not fit into the more specific subheadings. These compounds find applications across a vast array of industries, including specialty chemicals, pharmaceuticals, agriculture, and advanced materials, often in niche or specialized processes. Examples might include less common metal oxides used in specific catalysts, particular hydroxides for pH regulation, or peroxides for bleaching and oxidation processes. Importers and exporters are diverse, encompassing countries with specialized chemical industries and those requiring these compounds for specific manufacturing processes, often involving smaller volumes compared to major commodity chemicals. Trade is driven by specialized industrial needs, research applications, and unique material requirements, making it a fragmented but essential part of the global chemical supply chain.
- Covers
- Barium oxide
- Strontium oxide
- Lithium hydroxide
- Magnesium peroxide
- Calcium peroxide
- Cobalt(II) oxide
- Vanadium pentoxide
- Cerium oxide
- Examples
- Sigma-Aldrich (reagents)
- Merck KGaA (specialty chemicals)
- Solvay (peroxides)
- Lanxess (inorganic pigments)
Codes often confused with 2825.90
Common mistake. This code is often a last resort; misclassification occurs when specific oxides/hydroxides are incorrectly placed here instead of their dedicated codes (e.g., 282510 for hydrazine, 282520 for lithium oxide/hydroxide).
Top exporters and importers of HS code 282590, 2025
In 2025, the largest exporter of HS code 282590 in UN Comtrade data was China, with 24% of world exports; the largest importer in UN Comtrade data was South Korea, with 65% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Top exporters 2025 · share of world exports
- 1 China $290M 24% of world exports
- 2 United States $271M 22% of world exports
- 3 Brazil $129M 11% of world exports
World total: $1.2B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 South Korea $1.9B 65% of world imports
- 2 Japan $175M 5.9% of world imports
- 3 China $170M 5.7% of world imports
World total: $3.0B 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 2825.90 3
Brazil splits HS 2825.90 into 3 NCM codes, Mercosur's 8-digit tariff lines.
- 2825.90.10 Cadmium oxideÓxido de cádmio
- 2825.90.20 Tungsten trioxideTrióxido de tungstênio (volfrâmio)
- 2825.90.90 Other bases; metal oxides, hydroxides, peroxidesOutros
All Brazil NCM codes in heading 28.25 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
Questions about HS 2825.90
What is HS code 282590?
HS code 282590 is a 6-digit subheading in the Harmonized System that covers: Inorganic bases, metal oxides, hydroxides and peroxides; n.e.c. in heading no. 2825. This 'not elsewhere specified' (n.e.c.) category within heading 2825 acts as a residual classification for various inorganic bases, metal oxides, hydroxides, and peroxides that do not fit into the more specific subheadings. These compounds find applications across a vast array of industries, including specialty chemicals, pharmaceuticals, agriculture, and advanced materials, often in niche or specialized processes. Examples might include less common metal oxides used in specific catalysts, particular hydroxides for pH regulation, or peroxides for bleaching and oxidation processes. Importers and exporters are diverse, encompassing countries with specialized chemical industries and those requiring these compounds for specific manufacturing processes, often involving smaller volumes compared to major commodity chemicals. Trade is driven by specialized industrial needs, research applications, and unique material requirements, making it a fragmented but essential part of the global chemical supply chain.
What products fall under HS code 282590?
Barium oxide, Strontium oxide, Lithium hydroxide, Magnesium peroxide, Calcium peroxide, Cobalt(II) oxide, Vanadium pentoxide, Cerium oxide
What are common misclassifications for HS code 282590?
This code is often a last resort; misclassification occurs when specific oxides/hydroxides are incorrectly placed here instead of their dedicated codes (e.g., 282510 for hydrazine, 282520 for lithium oxide/hydroxide).
Which countries are the top exporters of goods under HS code 282590?
In 2025, the top exporters of HS code 282590 in UN Comtrade data were China ($290M, 24% of world exports), the United States ($271M) and Brazil ($129M). World exports came to about $1.2B, 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 282590?
In 2025, the top importers of HS code 282590 in UN Comtrade data were South Korea ($1.9B, 65% of world imports), Japan ($175M) and China ($170M). World imports came to about $3.0B, 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.
How is HS code 282590 structured?
HS code 282590 is a 6-digit subheading under the Harmonized System. The first 2 digits (28) identify the chapter, digits 3-4 (25) identify the heading, and digits 5-6 (90) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 282590?
Brazil splits HS code 282590 into 3 NCM codes: 2825.90.10 (Cadmium oxide), 2825.90.20 (Tungsten trioxide), 2825.90.90 (Other bases; metal oxides, hydroxides, peroxides). The first 6 digits of each match the HS code.