Subheading · Chapter 38 · Heading 3815
3815.90: Reaction initiators, reaction accelerators and catalytic: other
Other catalytic preparations
Official description Other
3815.90 is the HS subheading for other catalytic preparations, under heading 3815 in chapter 38.
What you pay
Importing into UK
Rates by national line · UK Global Tariff
UK lines →- 3815 90 00 00 Other
- 3815 90 10 00 Catalyst consisting of ethyltriphenylphosphonium acetate in the form of a solution in methanol Free
- 3815 90 90 00 Other 6%
- 3815 90 90 16 Initiator based on dimethylaminopropyl urea 6%
- 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%
- 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%
- 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%
- 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%
- 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%
- 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%
- 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%
- 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%
- 3815 90 90 76 Catalyst consisting of titanium dioxide and tungsten trioxide 6%
- 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%
- 3815 90 90 85 Catalyst based on aluminosilicate (zeolite), for the alkylation of aromatic hydrocarbons, for the transalkylation of alkylaromatic hydrocarbons or for the oligomerisation of olefins 6%
- 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%
- 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%
- 3815 90 90 90 Other 6%
Additional duties and import rules
Charges on top of the customs duty, and rules the goods must meet at the border.
Additional duties and charges 4
- Additional dutyAdditional duties 35%
- Applies to goods from
- Belarus, Russia
- Legal act
- 2022 No. 598
- Documents
- 9014
- Duty suspensionAirworthiness tariff suspension Free
- Applies to goods from
- all countries
- Legal act
- S.I. 2018/1249
- Documents
- C119 Authorised Release Certificate — EASA Form 1 (Appendix I to Annex I to Regulation (EU) No 748/2012), or equivalent certificate
- Duty suspensionAutonomous tariff suspension Free
- Applies to goods from
- all countries
- In force
- until 31 December 2028
- Legal act
- 2020 No. 1435
- Documents
- 9Y12
- Tariff lines
- on 9 of 16 lines
- Duty suspensionAutonomous suspension under end-use Free
- Applies to goods from
- all countries
- In force
- until 31 December 2028
- Legal act
- 2020 No. 1435
- Documents
- N990 EUS - Authorisation for the use of end use procedure (Column 8c, Annex A of Delegated Regulation (EU) 2015/2446)
- Tariff lines
- on 1 of 16 lines
Import requirements 4
- Prohibition or restrictionImport prohibition
- Applies to goods from
- North Korea
- Legal act
- S.I. 2019/411
- Import controlRestriction on entry into free circulation
- Applies to goods from
- Ukraine
- Legal act
- S.I. 2022/395
- Documents
- 9009
- 9010
- 9017
- Import controlImport control on restricted goods and technologies
- Applies to goods from
- Iran, North Korea
- Legal act
- S.I. 2019/461, S.I. 2019/411
- Documents
- Y966 Goods other than those described in the MG footnotes linked to the measure (Missile Technology Control Regime list - Annex III of Reg. (EU) 267/2012)
- Y920 Goods other than those described in the footnotes linked to the measure
- Import controlImport control - Waste
- Applies to goods from
- all countries
- Legal act
- S.I. 2019/590
- Documents
- C672 Information document accompanying shipments of waste as mentioned in Regulation (EU) 2024/1157 – Article 18 and Annex VII
- C669 Notification document as mentioned in Regulation (EU) 2024/1157 - Article 5 and Annex IA
- Y923 Product not subjected to the provisions of Regulation (EU) 2024/1157
- C670 Movement document as mentioned in Regulation (EU) 2024/1157 – Article 5 and Annex IB
- Tariff lines
- on 15 of 16 lines
Preferential rates by country
| Agreement or scheme | Countries | Rate |
|---|---|---|
| standard rate (no agreement) | — | Free – 6% |
| DCTS Comprehensive | Afghanistan, Angola, Bangladesh, Benin and 38 moreAfghanistan, Angola, Bangladesh, Benin, Bhutan, Burkina Faso, Burundi, Cambodia, Central African Republic, Chad, Comoros, Congo - Kinshasa, Djibouti, Eritrea, Ethiopia, Gambia, Guinea, Guinea-Bissau, Haiti, Kiribati, Laos, Liberia, Malawi, Mali, Mauritania, Myanmar (Burma), Nepal, Niger, Rwanda, São Tomé & Príncipe, Senegal, Sierra Leone, Somalia, South Sudan, Sudan, Tanzania, Timor-Leste, Togo, Tuvalu, Uganda, Yemen, Zambia | Free |
| European Union (including code "EU") | Free | |
| DCTS Enhanced | Algeria, Bolivia, Cape Verde, Congo - Brazzaville and 13 moreAlgeria, Bolivia, Cape Verde, Congo - Brazzaville, Cook Islands, Kyrgyzstan, Micronesia, Mongolia, Nigeria, Niue, Pakistan, Philippines, Sri Lanka, Syria, Tajikistan, Uzbekistan, Vanuatu | Free |
| CARIFORUM | Antigua & Barbuda, Bahamas, Barbados, Belize and 10 moreAntigua & Barbuda, Bahamas, Barbados, Belize, Dominica, Dominican Republic, Grenada, Guyana, Jamaica, St Kitts & Nevis, St Lucia, St Vincent & the Grenadines, Suriname, Trinidad & Tobago | Free |
| OCTs (Overseas Countries and Territories) | Anguilla, Bermuda, British Indian Ocean Territory, British Virgin Islands and 7 moreAnguilla, Bermuda, British Indian Ocean Territory, British Virgin Islands, Cayman Islands, Falkland Islands, Montserrat, Pitcairn Islands, South Georgia & South Sandwich Islands, St Helena, Turks & Caicos Islands | Free |
| Central America | Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, Panama | Free |
| SADC EPA | Botswana, Eswatini, Lesotho, Mozambique, Namibia | Free |
| Eastern and Southern Africa States | Madagascar, Mauritius, Seychelles, Zimbabwe | Free |
| CPTPP | Brunei, Malaysia | Free |
| UK–Andorra agreement | Andorra | Free |
| UK–Albania agreement | Albania | Free |
| UK–Australia agreement | Australia | Free |
| UK–Canada agreement | Canada | Free |
| UK–Switzerland agreement | Switzerland | Free |
| UK–Côte d’Ivoire agreement | Côte d’Ivoire | Free |
| UK–Chile agreement | Chile | Free |
| UK–Cameroon agreement | Cameroon | Free |
| UK–Colombia agreement | Colombia | Free |
| UK–Ceuta & Melilla agreement | Ceuta & Melilla | Free |
| UK–Ecuador agreement | Ecuador | Free |
| UK–Egypt agreement | Egypt | Free |
| UK–Fiji agreement | Fiji | Free |
| UK–Faroe Islands agreement | Faroe Islands | Free |
| UK–Georgia agreement | Georgia | Free |
| UK–Ghana agreement | Ghana | Free |
| DCTS Standard | Indonesia | Free |
| UK–Israel agreement | Israel | Free |
| UK–India agreement | India | Free |
| UK–Iceland agreement | Iceland | Free |
| UK–Jordan agreement | Jordan | Free |
| UK–Japan agreement | Japan | Free |
| UK–Kenya agreement | Kenya | Free |
| UK–South Korea agreement | South Korea | Free |
| UK–Lebanon agreement | Lebanon | Free |
| UK–Liechtenstein agreement | Liechtenstein | Free |
| UK–Morocco agreement | Morocco | Free |
| UK–Moldova agreement | Moldova | Free |
| UK–North Macedonia agreement | North Macedonia | Free |
| UK–Mexico agreement | Mexico | Free |
| UK–Norway agreement | Norway | Free |
| UK–New Zealand agreement | New Zealand | Free |
| UK–Peru agreement | Peru | Free |
| UK–Papua New Guinea agreement | Papua New Guinea | Free |
| UK–Palestinian Territories agreement | Palestinian Territories | Free |
| UK–Serbia agreement | Serbia | Free |
| UK–Solomon Islands agreement | Solomon Islands | Free |
| UK–Singapore agreement | Singapore | Free |
| UK–San Marino agreement | San Marino | Free |
| UK–Tunisia agreement | Tunisia | Free |
| UK–Türkiye agreement | Türkiye | Free |
| UK–Ukraine agreement | Ukraine | Free |
| UK–Vietnam agreement | Vietnam | Free |
| UK–Samoa agreement | Samoa | Free |
| UK–Kosovo agreement | Kosovo | Free |
| UK–South Africa agreement | South Africa | Free |
UK: imports by month
Main suppliers, last 12 months
| Country | Value | Share | Change |
|---|---|---|---|
| £53.5m | 59.1% | +46.8% | |
| £21.8m | 24% | -13.2% | |
| £2.6m | 2.8% | -42% | |
| £2.2m | 2.5% | +43.5% | |
| £1.6m | 1.7% | -37.3% | |
| £1.4m | 1.5% | -66.6% | |
| £1.3m | 1.5% | -38.9% | |
| £1m | 1.2% | -32.9% |
Same subheading in other tariffs
World trade in 2024
Trade value (US$) no reported trade < US$760.4kUS$760.4k+US$14.7m+US$78.8m+> US$303.4m
Exports: 114
- United States: US$1.3bn
- Germany: US$989.2m
- Japan: US$391.5m
- China: US$303.4m
- Netherlands: US$203.5m
- United Kingdom: US$186.3m
- Italy: US$114.4m
- Denmark: US$111.8m
- India: US$100.6m
- France: US$95.4m
- Saudi Arabia: US$78.8m
- Canada: US$65.8m
- Belgium: US$64.2m
- Sweden: US$63.4m
- South Korea: US$49.8m
- Russia: US$43.5m
- Switzerland: US$42.2m
- Singapore: US$39.5m
- Brazil: US$39m
- Spain: US$36.6m
- Austria: US$32.6m
- Finland: US$28m
- Taiwan: US$23m
- Türkiye: US$22.6m
- Australia: US$17.7m
- Poland: US$17.4m
- South Africa: US$16.4m
- Hong Kong SAR China: US$14.7m
- Norway: US$14m
- Czechia: US$13.5m
- Thailand: US$11.8m
- Malaysia: US$10.7m
- Hungary: US$9.8m
- Mexico: US$9.7m
- Qatar: US$7.4m
- Indonesia: US$6m
- Vietnam: US$5.5m
- Greece: US$4.9m
- Iran: US$3.5m
- Argentina: US$3.4m
- Slovenia: US$3.3m
- Romania: US$3.2m
- Brunei: US$2.6m
- North Macedonia: US$2.5m
- Lithuania: US$2.5m
- Slovakia: US$2.3m
- Estonia: US$2.1m
- Portugal: US$1.9m
- Ireland: US$1.8m
- Kuwait: US$1.8m
- Bulgaria: US$1.6m
- United Arab Emirates: US$1.4m
- Colombia: US$1.2m
- Guatemala: US$1.1m
- Chile: US$760.4k
- Bahrain: US$642.8k
- Costa Rica: US$610.7k
- Kazakhstan: US$604.9k
- Serbia: US$598.4k
- Uzbekistan: US$575k
Trade value (US$) no reported trade < US$944.6kUS$944.6k+US$11m+US$72m+> US$198.8m
Imports: 202
- China: US$417m
- South Korea: US$327.7m
- United States: US$325.5m
- Indonesia: US$233.2m
- Netherlands: US$229.1m
- India: US$198.8m
- Germany: US$195.1m
- Canada: US$160.6m
- Thailand: US$158.4m
- Italy: US$152.8m
- Saudi Arabia: US$137.5m
- Belgium: US$131.6m
- Taiwan: US$126.5m
- United Kingdom: US$121.2m
- Malaysia: US$102.7m
- Spain: US$98.7m
- France: US$92.6m
- Czechia: US$86.7m
- Mexico: US$82.5m
- Vietnam: US$72m
- Japan: US$69.9m
- Poland: US$69m
- United Arab Emirates: US$52.1m
- Türkiye: US$51.6m
- Austria: US$50.6m
- Singapore: US$50.2m
- Oman: US$47.1m
- Greece: US$46.1m
- Brazil: US$40.9m
- Kazakhstan: US$35.8m
- Colombia: US$31.9m
- Romania: US$30.1m
- South Africa: US$29.9m
- Sweden: US$28m
- Switzerland: US$25.6m
- Portugal: US$22.4m
- Norway: US$21.1m
- Argentina: US$20.7m
- Iraq: US$20.6m
- Kuwait: US$18.6m
- Australia: US$18.4m
- Russia: US$18.2m
- Bulgaria: US$16.9m
- Egypt: US$16.9m
- Hungary: US$15.2m
- Israel: US$14m
- Algeria: US$13.8m
- Hong Kong SAR China: US$13.4m
- Nigeria: US$12.6m
- Pakistan: US$11m
- Turkmenistan: US$11m
- Qatar: US$11m
- Denmark: US$10.4m
- Uzbekistan: US$9.3m
- Slovakia: US$8.9m
- Philippines: US$8.7m
- Brunei: US$8m
- Peru: US$7.5m
- Chile: US$7.3m
- Iran: US$6.8m
Top exporters
| Rank | Country | Value | Share |
|---|---|---|---|
| 1 | US$1.3bn | 27.5% | |
| 2 | US$989.2m | 21.5% | |
| 3 | US$391.5m | 8.5% | |
| 4 | US$303.4m | 6.6% | |
| 5 | US$203.5m | 4.4% | |
| 6 | US$186.3m | 4.1% | |
| 7 | US$114.4m | 2.5% | |
| 8 | US$111.8m | 2.4% | |
| 9 | US$100.6m | 2.2% | |
| 10 | US$95.4m | 2.1% |
Top importers
| Rank | Country | Value | Share |
|---|---|---|---|
| 1 | US$417m | 9.1% | |
| 2 | US$327.7m | 7.1% | |
| 3 | US$325.5m | 7.1% | |
| 4 | US$233.2m | 5.1% | |
| 5 | US$229.1m | 5% | |
| 6 | US$198.8m | 4.3% | |
| 7 | US$195.1m | 4.2% | |
| 8 | US$160.6m | 3.5% | |
| 9 | US$158.4m | 3.4% | |
| 10 | US$152.8m | 3.3% |
Binding rulings for similar goods 9
Decisions of U.S. Customs and Border Protection (CROSS) and HMRC (Advance Tariff Rulings) on goods classified here. A ruling binds only its holder, but shows how the authorities classify similar goods. The descriptions are the authorities’ own, in English.
- N316688 U.S. CBP
The tariff classification of cationic photoinitiators from Mexico
- N295074 U.S. CBP
The tariff classification of LESA 74070 and LESA 74071 from Canada or Mexico
- H279271 U.S. CBP
Application for Further Review of Protest No. 5309-15-100058; Nebula 20
- N282368 U.S. CBP
The tariff classification of “NC-25” from Japan Correction to Ruling Number N281144
- N281144 U.S. CBP
The tariff classification of “NC-25” from Japan
- N280932 U.S. CBP
The tariff classification of “Mn-OCTOATE 8%” from Japan.Correction to Ruling Number N280253
9 rulings in total for this code
The UK Global Tariff divides subheading 3815.90 into 16 tariff lines; the duty is between 0% and 6% (average 5.6%). 1 of them is duty-free.
In the EU Combined Nomenclature, subheading 3815.90 covers 2 tariff lines and the duty is between 0% and 6.5%. 1 of them is duty-free.
174 countries pay no duty in the UK thanks to trade agreements and preference schemes such as DCTS Comprehensive and European Union, against a standard rate of Free – 6%.
In the UK, additional duty of 35% applies on top of the customs duty to goods from Belarus and Russia.
Imports of other catalytic preparations into the UK came to £90.6m between September 2025 and August 2026 (up 8% on the year before); Germany supplied 59%, followed by United States.
In 2024, countries exported other catalytic preparations worth US$4.6bn (−4.4% year on year).
The largest exporter was the United States (US$1.3bn), followed by Germany.
Questions and answers
What is the HS code for reaction initiators, reaction accelerators and catalytic: other?
Reaction initiators, reaction accelerators and catalytic: other fall under HS subheading 3815.90, part of heading 3815, in section VI of the Harmonized System.
What is the import duty on reaction initiators, reaction accelerators and… in the UK?
Under the UK Global Tariff, imports under 3815.90 from countries without a preferential agreement are charged at 0% to 6%, depending on the line. Preferential rates, anti-dumping duties and VAT are not included.
What is the import duty on reaction initiators, reaction accelerators and… in the EU?
Under the EU Combined Nomenclature, imports under 3815.90 from countries without a preferential agreement are charged at 0% to 6.5%, depending on the line. Preferential rates, anti-dumping duties and VAT are not included.
Which country exports the most reaction initiators, reaction accelerators and…?
The United States, with US$1.3bn in 2024 (27.5% of world exports).
Which countries can export other catalytic preparations to the UK duty-free?
174 countries pay no duty under a trade agreement or preference scheme, among them partners under DCTS Comprehensive, European Union, DCTS Enhanced. The goods must meet the agreement’s rules of origin and the importer needs proof of origin; otherwise the standard rate of Free – 6% applies. Pick a country above to see its rate.
Is there anti-dumping duty on other catalytic preparations?
The UK charges additional duty of 35% on goods from Belarus and Russia. Lower rates apply to the named exporters listed in the measure.
Where does the UK import other catalytic preparations from?
In the 12 months to August 2026, the largest suppliers were Germany (59%), United States (24%) and Italy (3%), out of total imports of £90.6m.