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Customs code · HS subheading 3815 90

Final code reached

Other reaction initiators, reaction accelerators and catalytic preparations — not vulcanisation accelerators

Supported catalysts or the specified methanol solution

This is a complete 8-digit customs code. Exports and Intrastat use it as it is. For an import into the EU, pick a 10-digit line below.

This code covers reaction initiators, reaction accelerators and catalytic preparations not covered by a more specific neighbouring code. They must not be vulcanisation accelerators, catalysts on a carrier, or catalysts consisting of ethyltriphenylphosphonium acetate in methanol.

See the official tariff text

Official tariff text

Reaction initiators, reaction accelerators and catalytic preparations, n.e.s. (excl. rubber accelerators, supported catalysts and catalysts consisting of ethyltriphenylphosphonium acetate in the form of a solution in methanol)

You are seeing what applies when you export from the EU. Switch above if you import.

You are seeing what applies when you import into the EU. Switch above if you export.

Your answer for export

The full EU export code is 3815 90 90.

You do not pick a 10-digit EU import line for an export declaration or Intrastat. The destination classifies the goods under its own tariff.

8 digits, ready

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

38.15.9000 Other

Norwegian tariff data checked Sept. 13, 2026.

Great Britain

6.0%

  • Their lines15 British lines
  • EU originDuty free

3815 90 90 16 Initiator based on dimethylaminopropyl urea

Northern Ireland follows other rules.

UK tariff data checked Sept. 13, 2026.

United States

10.0%

Estimated from published US measures

  • Their lines4 US lines
  • Entry dateSept. 17, 2026

3815.90.10.00 Reaction initiators, reaction accelerators and catalytic preparations, not elsewhere

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.

  • 38.15.9000

    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 15 British lines

Selling to Great Britain

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

  • All 15 UK lines under this code

    They all have the same duty rates shown here.

    Ordinary duty
    6.0%
    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 4 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.

  • 3815.90.10.00

    Reaction initiators, reaction accelerators and catalytic preparations, not elsewhere specified or included, Other, Consisting wholly of inorganic substances, Of bismuth, of tungsten or of vanadium

    General rate
    6.5%
    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

  • 3815.90.20.00

    Reaction initiators, reaction accelerators and catalytic preparations, not elsewhere specified or included, Other, Consisting wholly of inorganic substances, Of mercury or of molybdenum

    General rate
    2.8%
    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

  • 3815.90.30.00

    Reaction initiators, reaction accelerators and catalytic preparations, not elsewhere specified or included, Other, Consisting wholly of inorganic substances, Other

    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

  • 3815.90.50.00

    Reaction initiators, reaction accelerators and catalytic preparations, not elsewhere specified or included, Other

    General rate
    5%
    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

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.

Before you use the code

Check the facts that sit outside the code

The code can be right while what you pay still changes, because of where the goods come from, when they arrive, or extra EU measures.

Classify your own product, free Look up the current rates and rules
  1. The product and its form Check that your product really matches this description, including what it is made of and the form it arrives in.
  2. Country of origin Trade agreements, sanctions and extra measures can change the treatment of the very same code.
  3. Current tariff measures Check today's rate, any restrictions or licences, and the quantity customs asks for, with Toldstyrelsen or TARIC.

On an EU import declaration

Pick the 10-digit line that matches the goods.

15 import lines

When these goods are imported into the EU, the declaration needs a 10-digit code. Under 3815 90 90 the EU tariff has 15 lines, each with its own wording.

You or your customs agent pick the line whose wording fits the goods; the last line, "Other", covers what none of the specific wordings describe.

Some lines depend on what the goods will be used for and need customs authorisation; matching the wording alone does not give a lower rate.

  1. Match the whole wording A line is its own wording plus the grouping text above it. Read both before you settle on one.
  2. Check the intended use On some lines the lower rate belongs to what the goods will be used for, not to the goods alone.
  3. Confirm the authorisation Where the lower rate carries conditions, customs asks for an authorisation before it can be used.

  • 3815 90 90 16

    Initiator based on dimethylaminopropyl urea

    6.5%

    Duty suspension: 0%

    This line in the EU tariff Rulings on this line

  • 3815 90 90 30

    Catalyst, consisting of a suspension in mineral oil of: - tetrahydrofuran complexes of magnesium chloride and titanium(III) chloride; and - silicon dioxide - containing 6,6 % (± 0,6 %) by weight of magnesium, and - containing 2,3 % (± 0,2 %) by weight of titanium

    6.5%

    Duty suspension: 0%

    This line in the EU tariff Rulings on this line

  • 3815 90 90 38

    Photoinitiator, containing by weight: -80 % or more of polyethylene glycol di[β-4-[4-(2-dimethylamino-2-benzyl)butanoylphenyl]piperazine]propionate (CAS RN 886463-10-1), -not more than 17 % of polyethylene glycol [β-4-[4-(2-dimethylamino-2-benzyl)butanoylphenyl]piperazine]propionate

    6.5%

    Duty suspension: 0%

    This line in the EU tariff Rulings on this line

  • 3815 90 90 43

    Catalyst in powder form consisting by weight of -92,50 % (± 2) % titanium dioxide (CAS RN 13463-67-7) -5 % (± 1) % silicon dioxide (CAS RN 112926-00-8) and -2,5 % (± 1,5) % sulphur trioxide (CAS RN 7446-11-9)

    6.5%

    Duty suspension: 0%

    This line in the EU tariff Rulings on this line

  • 3815 90 90 48

    Photoinitiator containing by weight: -88 % or more of α-(2-benzoylbenzoyl)-ω-[(2-benzoylbenzoyl)oxy]-poly(oxy-1,2-ethanediyl) (CAS RN 1246194-73-9), -not more than 12 % of α-(2-benzoylbenzoyl)-ω-hydroxy-poly(oxy-1,2-ethanediyl) (CAS RN 1648797-60-7)

    6.5%

    Duty suspension: 0%

    This line in the EU tariff Rulings on this line

  • 3815 90 90 50

    Catalyst containing titanium trichloride, in the form of a suspension in hexane or heptane containing by weight, in the hexane- or heptane-free material, 9 % or more but not more than 30 % of titanium

    6.5%

    Duty suspension: 0%

    This line in the EU tariff Rulings on this line

  • 3815 90 90 55

    Catalytic Additives for fluid catalytic cracking (FCC), not containing Y type zeolite (CAS RN 308079-79-0), and not being a FCC (Fluid Catalytic Cracking) base catalyst, in the form of powder, consisting of a mixture of one or more of the following active substances: -calcium carbonate (CAS RN 471-34-1), -copper oxide (CAS RN 1217-38-0), -iron oxide (CAS RN 1309-37-1), -aluminium magnesium vanadium oxide (CAS RN 70621-8-0), -vanadium pentoxide (CAS RN 1314-62-1), -aluminium phosphate (CAS RN 7784-30-7), -cerium oxide (CAS RN 1306-38-3), -ZSM-5 type zeolite (CAS RN 308081-08-5), and one or more of the following inert substances: -magnesium oxide (CAS RN 1309-48-8), -aluminium oxide (CAS RN 1344-28-1), -kaolin (CAS RN 1332-58-7)

    6.5%

    Duty suspension: 0%

    This line in the EU tariff Rulings on this line

  • 3815 90 90 58

    1,1′-Bis(4-triethylsilylphenyl)methylene(cyclopentadienyl)(2,7-di-tert-butyl-9-fluorenyl)dimethylhafnium (CAS RN 264926-41-2) in the form of a hexane (CAS RN 110-54-3) solution, containing by weight 2,0 % or more but not more than 2,5 % of 1,1′-bis(4-triethylsilylphenyl)methylene(cyclopentadienyl)(2,7-di-tert-butyl-9-fluorenyl)dimethylhafnium

    6.5%

    Duty suspension: 0%

    This line in the EU tariff Rulings on this line

  • 3815 90 90 60

    Dinonylnaphthalenedisulfonic acid (CAS RN 60223-95-2) with a content by weight of 50 % or more but not more than 65 %, in the form of a solution in isobutanol (CAS RN 78-83-1)

    6.5%

    Duty suspension: 0%

    This line in the EU tariff Rulings on this line

  • 3815 90 90 76

    Catalyst consisting of titanium dioxide and tungsten trioxide

    6.5%

    Duty suspension: 0% for ships, boats and drilling platforms

    Conditions apply, customs authorisation needed.

    This line in the EU tariff Rulings on this line

  • 3815 90 90 81

    Catalyst, containing by weight 69 % or more but not more than 79 % of (2-hydroxy-1-methylethyl)trimethylammonium 2-ethylhexanoate

    6.5%

    Duty suspension: 0%

    This line in the EU tariff Rulings on this line

  • 3815 90 90 85

    Catalyst based on aluminosilicate (zeolite), for the alkylation of aromatic hydrocarbons, for the transalkylation of alkylaromatic hydrocarbons or for the oligomerization of olefins

    6.5%

    Duty suspension: 0% under an end-use authorisation

    Conditions apply, customs authorisation needed.

    This line in the EU tariff Rulings on this line

  • 3815 90 90 88

    Catalyst, consisting of titanium tetrachloride and magnesium chloride, containing by weight on an oil- and hexane-free basis: - 4 % or more but not more than 10 % of titanium and - 10 % or more but not more than 20 % magnesium

    6.5%

    Duty suspension: 0%

    This line in the EU tariff Rulings on this line

  • 3815 90 90 89

    Rhodococcus rhodocrous J1 bacteria, containing enzymes, suspended in a polyacrylamide gel or in water, for use as a catalyst in the production of acrylamide by the hydration of acrylonitrile

    6.5%

    Duty suspension: 0% under an end-use authorisation

    Conditions apply, customs authorisation needed.

    This line in the EU tariff Rulings on this line

  • 3815 90 90 90

    Other

    6.5%

    Duty suspension: 0% for ships, boats and drilling platforms

    Conditions apply, customs authorisation needed.

    This line in the EU tariff Rulings on this line

A suspension is a lower rate the EU grants for specific products; whether your goods qualify depends on the line's wording and conditions.

Exports from the EU and Intrastat normally use the 8-digit code as it is.

EU tariff data of Sept. 13, 2026.

This is the catch-all under 3815 90: it covers what the sibling codes below do not.

Within this parent group, this is where the reaction initiators, reaction accelerators and catalytic preparations go when they are not vulcanisation accelerators, supported catalysts or the specifically named methanol solution.

Rates, origin and documents

Read the signals first. Open only the ones you want to check.

Besides the ordinary duty, the EU records these kinds of measure against this code. They are listed as signals only: whether one applies to your goods can depend on where they come from, who produced them, the exact product and the documents you present. No amounts are worked out here.

Data of Sept. 1, 2026

Lower duty for goods from some countries

Possible

Preferential rates exist for goods originating in:

  • San Marino
  • Comoros (excluding Mayotte), Madagascar, Mauritius, Seychelles and dependencies and Zimbabwe
  • Botswana, Eswatini, Lesotho, Mozambique and Namibia
  • Ivory Coast
  • Cameroon
  • Fiji
  • United Kingdom
  • Ghana
  • +46 origins

These rates apply to Economic Partnership Agreements; CARIFORUM except Haiti; GSP-EBA (Special arrangement for the least-developed countries - Everything But Arms); OCTs (Overseas Countries and Territories); GSP - General arrangements; GSP+ (incentive arrangement for sustainable development and good governance).

Whether you can use one depends on the origin rules for the goods and on the documentation you can show.

Check this code in the official EU TARIC database

A limited quantity at a lower rate

Check

A tariff quota is recorded for this code. This does not say whether any of the quota is still available. It covers goods originating in:

  • any country except Belarus and Russian Federation

This is recorded on a more detailed code below this one, so it may not cover your goods. See the import lines under this code

Check this code in the official EU TARIC database

Restrictions and paperwork

Important

Import restrictions are recorded for goods originating in:

  • Ukraine
  • North Korea (Democratic People’s Republic of Korea)
  • any country except Iran, Islamic Republic of
  • Iran, Islamic Republic of
  • any country

The EU records document conditions on this code. What customs may ask for depends on where the goods come from, exactly what the product is and the customs procedure.

Proof of origin 2 conditions

If you claim a lower rate for goods from a country the EU has a trade agreement with, customs asks for proof of origin, for example a EUR.1 certificate or an origin declaration.

Show the EU's own wording for these conditions
  • Invoice declaration or origin declaration made out by any exporter on invoice or any other commercial document
  • Movement certificate EUR.1

Sanctions and restricted regions 6 conditions

Some conditions come from EU sanctions rules. They matter when the goods are linked to a country or region the EU restricts trade with.

Show the EU's own wording for these conditions
  • Goods not originating from or destined to Crimea or Sevastopol (Articles 2 and 2b.1 of Council Regulation (EU) No 692/2014)
  • Goods not originating from or not destined for the non-government controlled areas of Ukraine in the oblasts of Donetsk, Kherson, Luhansk and Zaporizhzhia
  • Goods not consigned from Iran
  • Import authorisation for restricted goods and technologies (Council Regulation (EU) No 267/2012)
  • Goods other than those described in the footnotes linked to the measure (Reg 267/2012)
  • The declared goods are not concerned by Council Regulation (EC) No. 267/2012, Annex II

Product controls and permits 4 conditions

Depending on the exact product, customs may ask for a licence, a permit or a control certificate before the goods are released.

Show the EU's own wording for these conditions
  • Notification document as mentioned in Regulation (EU) 2024/1157 - Article 5 and Annex IA
  • Compliance with the REACH restrictions defined in Column 2 of Annex XVII of Regulation (EC) No 1907/2006
  • Exemption from REACH restrictions by virtue of Article 67(1) and 67(2) of Regulation (EC) No 1907/2006
  • Substance/mixture not subjected to the provisions of Regulation (EC) No 1907/2006 (Annex XVII)

Statements that the goods are outside a rule's scope 1 condition

Some conditions are statements that a rule does not cover the goods, for example that the product is not on a controlled list.

Show the EU's own wording for this condition
  • Goods other than those described in the footnotes linked to the measure

Other conditions 3 conditions

These conditions match none of the groups above. Whether customs asks for one depends on the goods, where they come from and the customs procedure.

Show the EU's own wording for these conditions
  • Product not subjected to the provisions of Regulation (EU) 2024/1157
  • Information document accompanying shipments of waste as mentioned in Regulation (EU) 2024/1157 – Article 18 and Annex VII
  • Movement document as mentioned in Regulation (EU) 2024/1157 – Article 5 and Annex IB
Check this code in the official EU TARIC database

EU tariff measure data of Sept. 1, 2026.

One last classification check

Check the path and the nearest alternatives.

Use this view if you are still unsure the code describes the product precisely.

How we got to this code

  1. VI
  2. 38
  3. 3815
  4. 3815 90
  5. 3815 90 90
Show the steps

Compare with the codes next to it.

Compare the sibling codes at this level before you settle on this one.

Classification decides the rate here: from duty free to 6.5%.

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.