Code 2825 90 · Heading 2825

Other inorganic bases and metal oxides, hydroxides and peroxides, not elsewhere named

This code covers inorganic bases and metal oxides, hydroxides and peroxides that are not named in the other subdivisions of this group. It does not cover goods covered by headings 2815–2824.

See the official tariff text

Official tariff text

Bases, inorganic, and metal oxides, hydroxides and peroxides, n.e.s.

How we got to this code

VI
28
2825
2825 90

Show the steps

The path to this code

Every code is reached through these choices, one level at a time.

Step 4 of 4

Step 1 · Section VI Products of the chemical or allied industries
Is it an inorganic or organic chemical; a pharmaceutical product; a fertilizer; a tanning or dye extract, pigment, paint, varnish, filler or printing ink; an essential oil, perfume, cosmetic or toilet product; soap, a surface-active, washing, cleaning, polishing or wax product; a protein, modified starch, glue or enzyme; an explosive, pyrotechnic article, match or other specified combustible material; a photographic or cinematographic product; or another chemical product?
✓
Step 2 · Chapter 28 Inorganic chemicals; organic or inorganic compounds… 1 of 11 chapters in section VI
Which named chemical or chemical family best describes the product—for example a metal, acid, oxide, salt, isotope, compound or another substance listed under this category?
✓
Step 3 · Heading 2825 Hydrazine and hydroxylamine and their inorganic sal… 25 of 50 headings under chapter 28
Is the product hydrazine or hydroxylamine (or an inorganic salt of either), lithium oxide or lithium hydroxide, a vanadium oxide or hydroxide, a nickel oxide or hydroxide, a copper oxide or hydroxide, germanium oxide or zirconium dioxide, a molybdenum oxide or hydroxide, an antimony oxide, or another inorganic base or metal oxide, hydroxide or peroxide not specified elsewhere?
✓
Step 4 · Subheading 2825 90 Bases, inorganic, and metal oxides, hydroxides and … 9 of 9 subheadings under heading 2825
Is the product the specifically described calcium hydroxide granules, another calcium oxide, calcium hydroxide or calcium peroxide, beryllium oxide or hydroxide, tungsten oxide or hydroxide, cadmium oxide, or another inorganic base or metal oxide, hydroxide or peroxide?

Pick the 8-digit code

Pick the description that best matches your product.

Import duty on the codes below: 0.0–5.5%

6 codes below this one

This is the catch-all under 2825: it covers what the sibling codes below do not.

Within this parent group, this is for inorganic bases and metal oxides, hydroxides and peroxides that are not covered by the sibling categories naming hydrazine and hydroxylamine, lithium, vanadium, nickel, copper, germanium, zirconium, molybdenum or antimony.

Compare the sibling codes

See all 9 codes at this level

Classification decides the rate here: from 0.0% to 5.5%.

2825 10 Hydrazine and hydroxylamine and their inorganic salts 5.5%
2825 20 Lithium oxide and hydroxide 5.3%
2825 30 Vanadium oxides and hydroxides 5.5%
2825 40 Nickel oxides and hydroxides 0.0%
2825 50 Copper oxides and hydroxides 3.2%
2825 60 Germanium oxides and zirconium dioxide 5.5%
2825 70 Molybdenum oxides and hydroxides 5.3%
2825 80 Antimony oxides 5.5%
2825 90 Bases, inorganic, and metal oxides, hydroxides and peroxides, n.e.s. you are here 0.0–5.5%

Selling to Norway, Great Britain and the United States

What they charge on arrival.

Norway, Great Britain and the United States use their own tariff lines under the 6-digit HS code. The rates below are what their customs charge on goods arriving from the EU. Match the goods against each country's own wording before you rely on a rate.

Norway

Duty free

Their lines1 Norwegian line

28.25.9000 Other

Norwegian tariff data checked Sept. 13, 2026.

Great Britain

From 0.0% to 4.0%

Their lines8 British lines

2825 90 11 00 Calcium hydroxide of a purity of 98|% or more calculated on the dry weight, in the form

Northern Ireland follows other rules.

UK tariff data checked Sept. 13, 2026.

United States

From 3.7% to 10.0%

Estimated from published US measures

Their lines6 US lines
Entry dateSept. 17, 2026

2825.90.10.00 Hydrazine and hydroxylamine and their inorganic salts; other inorganic bases; other metal

The US importer of record files the entry.

US tariff data checked Sept. 16, 2026.

See the 1 Norwegian line

Selling to Norway

Norway splits the 6-digit category its own way, so these are Norway's own lines under it, not this EU code. Check your product against their wording; what Norwegian customs charges is shown per line.

28.25.9000

Other

Ordinary duty

Duty free

Norwegian tariff data version 1.5/1.2, last checked Sept. 13, 2026.

Contains data from Norwegian Customs (data.toll.no), licensed under CC BY 4.0, adapted for display.

See the 8 British lines

Selling to Great Britain

What UK customs charges when goods like these arrive in Great Britain.

2825 90 11 00

Calcium hydroxide of a purity of 98|% or more calculated on the dry weight, in the form of particles of which: -|not more than 1|% by weight have a particle-size exceeding 75|micrometres and -|not more than 4|% by weight have a particle-size of less than 1,3|micrometres

Ordinary duty

Duty free
2825 90 19 00

Other

Ordinary duty

4.0%

Goods of EU origin

Duty free You need documentation of EU preferential origin to use this rate.
2825 90 20 00

Beryllium oxide and hydroxide

Ordinary duty

4.0%

Goods of EU origin

Duty free You need documentation of EU preferential origin to use this rate.
2825 90 40 30

Tungsten trioxide, including blue tungsten oxide (CAS RN 1314-35-8 or CAS RN 39318-18-8)

Ordinary duty

4.0%

Goods of EU origin

Duty free You need documentation of EU preferential origin to use this rate.
2825 90 40 80

Other

Ordinary duty

4.0%

Goods of EU origin

Duty free You need documentation of EU preferential origin to use this rate.
2825 90 60 00

Cadmium oxide

Ordinary duty

Duty free
2825 90 85 10

Tin oxides and hydroxides

Ordinary duty

4.0%

Goods of EU origin

Duty free You need documentation of EU preferential origin to use this rate.
2825 90 85 90

Other

Ordinary duty

4.0%

Goods of EU origin

Duty free You need documentation of EU preferential origin to use this rate.

These rates apply in Great Britain. Different rules may apply for goods entering Northern Ireland.

UK tariff data version v4.0.1599, last checked Sept. 13, 2026.

Contains public sector information licensed under the Open Government Licence v3.0.

Source: UK Department for Business and Trade (data.api.trade.gov.uk).

See the 6 US lines

Selling to the United States

What US customs charges when goods like these arrive from the EU. The US importer of record files the entry and pays the duty.

2825.90.10.00

Hydrazine and hydroxylamine and their inorganic salts; other inorganic bases; other metal oxides, hydroxides and peroxides, Other, Beryllium oxide and hydroxide

General rate

3.7%

From the EU

10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99
2825.90.15.00

Hydrazine and hydroxylamine and their inorganic salts; other inorganic bases; other metal oxides, hydroxides and peroxides, Other, Niobium oxide

General rate

3.7%

From the EU

3.7% Estimated from published US measures US headings applied: 9903.05.86 U.S. note 52(b) to subchapter III of chapter 99, 91 FR 47318: as provided in heading 9903.05.86, the duties imposed by headings 9903.05.20 through 9903.05.84 shall not apply to articles classifiable in the listed provisions
2825.90.20.00

Hydrazine and hydroxylamine and their inorganic salts; other inorganic bases; other metal oxides, hydroxides and peroxides, Other, Tin oxides

General rate

4.2%

From the EU

4.2% Estimated from published US measures US headings applied: 9903.05.86 U.S. note 52(b) to subchapter III of chapter 99, 91 FR 47318: as provided in heading 9903.05.86, the duties imposed by headings 9903.05.20 through 9903.05.84 shall not apply to articles classifiable in the listed provisions
2825.90.30.00

Hydrazine and hydroxylamine and their inorganic salts; other inorganic bases; other metal oxides, hydroxides and peroxides, Other, Tungsten oxides

General rate

5.5%

From the EU

5.5% Estimated from published US measures US headings applied: 9903.05.86 U.S. note 52(b) to subchapter III of chapter 99, 91 FR 47318: as provided in heading 9903.05.86, the duties imposed by headings 9903.05.20 through 9903.05.84 shall not apply to articles classifiable in the listed provisions
2825.90.75.00

Hydrazine and hydroxylamine and their inorganic salts; other inorganic bases; other metal oxides, hydroxides and peroxides, Other, Cadmium oxide

General rate

Free

From the EU

10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99
2825.90.90.00

Hydrazine and hydroxylamine and their inorganic salts; other inorganic bases; other metal oxides, hydroxides and peroxides, Other

General rate

3.7%

From the EU

3.7% Estimated from published US measures US headings applied: 9903.05.86 U.S. note 52(b) to subchapter III of chapter 99, 91 FR 47318: as provided in heading 9903.05.86, the duties imposed by headings 9903.05.20 through 9903.05.84 shall not apply to articles classifiable in the listed provisions

Worked out for an entry on Sept. 17, 2026.

US tariff schedule 2026HTSRev19, last checked Sept. 16, 2026.

Last change we recorded: Revision 19 (2026), Sept. 16, 2026.

Anti-dumping and countervailing duties, US import taxes and customs fees are not included.

The descriptions above are the US tariff texts, which the United States publishes in English only.

Source: the US International Trade Commission's Harmonized Tariff Schedule (hts.usitc.gov), public domain, and the measures published in the Federal Register.

This is a planning estimate from the US Harmonized Tariff Schedule (revision shown) and the published Federal Register measures as of the date shown, for a shipment of EU origin. It is not a customs entry, legal advice or a broker's opinion, and tariffs.help is not a US-licensed customs broker. The US importer of record or their broker confirms the classification, origin, value and the duty due before filing.

Duty rates shown here are estimates, read from official EU / Danish, Norwegian and UK tariff data for orientation only. Confirm the current rate with Toldstyrelsen, TARIC, Norwegian Customs or the UK Online Trade Tariff before you file. The rate you pay can also depend on the country of origin. These are base customs duties only: import VAT, excise duties, anti-dumping duties and safeguard or quota measures are not included.