Code 3815 90 · Heading 3815

Other reaction initiators, reaction accelerators and catalytic preparations, not on a carrier

This code covers reaction initiators, reaction accelerators and catalytic preparations not covered by the neighbouring codes for catalysts on a carrier. It excludes vulcanisation accelerators.

For example

An unsupported reaction initiator that is not a vulcanisation accelerator
An unsupported catalytic preparation that is not a vulcanisation accelerator
A catalyst consisting of ethyltriphenylphosphonium acetate in methanol solution, not on a carrier

See the official tariff text

Official tariff text

Reaction initiators, reaction accelerators and catalytic preparations, n.e.s. (excl. rubber accelerators and supported catalysts)

How we got to this code

VI
38
3815
3815 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 38 Miscellaneous chemical products 11 of 11 chapters in section VI
Which specific product type is it: a carbon or mineral product, resin or terpentine product, pesticide, textile, paper or leather treatment, soldering or welding preparation, oil or fuel additive, rubber or plastic additive, fire-extinguishing preparation, solvent or paint remover, catalyst, refractory product, alkylbenzene or alkylnaphthalene mixture, doped electronic material, hydraulic fluid, antifreeze or de-icing liquid, culture substrate, diagnostic or laboratory reagent, fatty acid or fatty alcohol, foundry binder or other chemical preparation, chemical waste, biodiesel, or a mixture containing halogenated methane, ethane or propane derivatives?
✓
Step 3 · Heading 3815 Reaction initiators, reaction accelerators and cata… 15 of 27 headings under chapter 38
Is it a supported catalyst—and, if so, is its active substance nickel or nickel compounds, precious metal or precious metal compounds, or another substance?
✓
Step 4 · Subheading 3815 90 Reaction initiators, reaction accelerators and cata… 4 of 4 subheadings under heading 3815
Is it a catalyst consisting of ethyltriphenylphosphonium acetate in methanol solution, rather than another product in this group?

Pick the 8-digit code

Pick the description that best matches your product.

Import duty on the codes below: 0.0–6.5%

2 codes below this one

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

This is the part of the parent group covering reaction initiators, reaction accelerators and catalytic preparations that are not vulcanisation accelerators or catalysts on a carrier, and are not named by a neighbouring code.

Compare the sibling codes

See all 4 codes at this level

Classification decides the rate here: from 0.0% to 6.5%.

3815 11 Supported catalysts with nickel or a nickel compound as the active substance, n.e.s. 6.5%
3815 12 Supported catalysts with precious metal or a precious-metal compound as the active substance, n.e.s. 6.5%
3815 19 Supported catalysts, n.e.s. (excl. with precious metal, a precious-metal compound, nickel or a nickel compound as the active substance) 0.0–6.5%
3815 90 Reaction initiators, reaction accelerators and catalytic preparations, n.e.s. (excl. rubber accelerators and supported catalysts) you are here 0.0–6.5%

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

38.15.9000 Other

Norwegian tariff data checked Sept. 13, 2026.

Great Britain

From 0.0% to 6.0%

Their lines16 British lines

3815 90 10 00 Catalyst consisting of ethyltriphenylphosphonium acetate in the form of a solution

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 16 British lines

Selling to Great Britain

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

3815 90 10 00

Catalyst consisting of ethyltriphenylphosphonium acetate in the form of a solution in methanol

Ordinary duty

Duty free
3815 90 90 16

Initiator based on dimethylaminopropyl urea

Ordinary duty

6.0%

Goods of EU origin

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

Ordinary duty

6.0%

Goods of EU origin

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

Ordinary duty

6.0%

Goods of EU origin

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

Ordinary duty

6.0%

Goods of EU origin

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

Ordinary duty

6.0%

Goods of EU origin

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

Ordinary duty

6.0%

Goods of EU origin

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

Ordinary duty

6.0%

Goods of EU origin

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

Show all 16 lines

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

Ordinary duty

6.0%

Goods of EU origin

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

Ordinary duty

6.0%

Goods of EU origin

Duty free You need documentation of EU preferential origin to use this rate.
3815 90 90 76

Catalyst consisting of titanium dioxide and tungsten trioxide

Ordinary duty

6.0%

Goods of EU origin

Duty free You need documentation of EU preferential origin to use this rate.
3815 90 90 81

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

Ordinary duty

6.0%

Goods of EU origin

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

Ordinary duty

6.0%

Goods of EU origin

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

Ordinary duty

6.0%

Goods of EU origin

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

Ordinary duty

6.0%

Goods of EU origin

Duty free You need documentation of EU preferential origin to use this rate.
3815 90 90 90

Other

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.

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.