3815.90: Reaction initiators, reaction accelerators and catalytic: other

1. 3815 90 00 00 Other
2. 3815 90 10 00 Catalyst consisting of ethyltriphenylphosphonium acetate in the form of a solution in methanol Free
3. 3815 90 90 00 Other 6%
4. 3815 90 90 16 Initiator based on dimethylaminopropyl urea 6%
5. 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%
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%
7. 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%
8. 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%
9. 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%
10. 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%
11. 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%
12. 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%
13. 3815 90 90 76 Catalyst consisting of titanium dioxide and tungsten trioxide 6%
14. 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%
15. 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%
16. 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%
17. 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%
18. 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.

Preferential rates by country

UK: imports by month

last 12 months£90.6m+7.6% · previous 12 months

Average import price£3.30 per kg

Main suppliers, last 12 months

Country	Value	Share	Change
Germany	£53.5m	59.1%	+46.8%
United States	£21.8m	24%	-13.2%
Italy	£2.6m	2.8%	-42%
Switzerland	£2.2m	2.5%	+43.5%
Belgium	£1.6m	1.7%	-37.3%
Netherlands	£1.4m	1.5%	-66.6%
France	£1.3m	1.5%	-38.9%
Poland	£1m	1.2%	-32.9%

Same subheading in other tariffs

EU Free – 6.5% Third-country duty 2 tariff lines · average 3.3% Türkiye Free – 6.5% Third-country duty 2 tariff lines · average 3.3% USA Free – 6.5% General (MFN) 4 tariff lines · average 3.6% Canada Free General (MFN) 1 tariff line Mexico Free – 5% General (MFN) 4 tariff lines · average 1.3% Brazil Free – 10.8% General (MFN) 5 tariff lines · average 3.6% Argentina Free – 10.8% General (MFN) 8 tariff lines · average 3.6% Peru Free General (MFN) 1 tariff line New Zealand Free General (MFN) 2 tariff lines Japan Free – 3.9% General (MFN) 4 tariff lines · average 2.1% Taiwan 1% – 5% General (MFN) 3 tariff lines · average 3.7% GCC 5% General (MFN) 2 tariff lines Switzerland Free General (MFN) 1 tariff line Norway Free General (MFN) 1 tariff line North Macedonia Free General (MFN) 2 tariff lines Nigeria 10% General (MFN) 1 tariff line

World trade in 2024

Top exporters

Rank	Country	Value	Share
1	United States	US$1bn	27.5%
2	Germany	US$989m	21.5%
3	Japan	US$392m	8.5%
4	China	US$303m	6.6%
5	Netherlands	US$203m	4.4%
6	United Kingdom	US$186m	4.1%
7	Italy	US$114m	2.5%
8	Denmark	US$112m	2.4%
9	India	US$101m	2.2%
10	France	US$95m	2.1%

Top importers

Rank	Country	Value	Share
1	China	US$417m	9.1%
2	South Korea	US$328m	7.1%
3	United States	US$326m	7.1%
4	Indonesia	US$233m	5.1%
5	Netherlands	US$229m	5%
6	India	US$199m	4.3%
7	Germany	US$195m	4.2%
8	Canada	US$161m	3.5%
9	Thailand	US$158m	3.4%
10	Italy	US$153m	3.3%

Import duty on this product around the world 165

The most-favoured-nation (MFN) duty each country applies to goods of this HS subheading: the average over its national tariff lines, with the lowest and highest line where they differ. Goods from countries with a trade agreement often pay less.

• 5%median duty
• 39number of duty-free countries (MFN)
• 45%highest: Bahamas, Bermuda, Cayman Islands

165

Importing country	MFN duty	lines from – to	data year
Afghanistan	5%		2018 · HS 2012
Albania	2%		2023
Algeria	15%		2023
Angola	0%		2023 · HS 2017
Anguilla	15%		2021 · HS 2017
Antigua & Barbuda	5%		2021 · HS 2007
Argentina	4.8%	2% – 12%	2023 · HS 2017
Armenia	5%		2023
Aruba	12%		2021 · HS 2012
Australia	5%		2023
Azerbaijan	5%		2023 · HS 2017
Bahamas	45%		2022
Bahrain	5%		2023
Bangladesh	10%		2023 · HS 2017
Barbados	5%		2022 · HS 2017
Belarus	5%		2021 · HS 2017
Belize	5%		2023
Benin	10%		2023
Bermuda	25%		2023
Bhutan	10%		2022
Bolivia	10%		2023 · HS 2017
Bosnia & Herzegovina	0%		2022
Botswana	0%		2023
Brazil	4.8%	2% – 12%	2023 · HS 2017
Brunei	0%		2023 · HS 2017
Burkina Faso	10%		2023
Burundi	10%		2023
Cambodia	7%		2023 · HS 2017
Cameroon	10%		2023
Canada	0%		2023
Cape Verde	5%		2023 · HS 2017
Cayman Islands	22%		2021 · HS 2002
Central African Republic	10%		2023
Chad	10%		2023
Chile	6%		2023 · HS 2017
China	6.5%		2023
Colombia	0%		2023 · HS 2017
Comoros	20%		2021 · HS 2017
Congo - Brazzaville	10%		2023
Cook Islands	0%		2022 · HS 2017
Costa Rica	4.5%	0% – 9%	2023
Côte d’Ivoire	10%		2023 · HS 2017
Cuba	10%		2023 · HS 2017
Dominica	5%		2023 · HS 2017
Dominican Republic	0%		2023
Ecuador	0%		2023 · HS 2017
Egypt	5%		2019 · HS 2017
El Salvador	5%	0% – 10%	2022
Equatorial Guinea	10%		2023
Eswatini	0%		2023
Ethiopia	10%		2021 · HS 2017
European Union (27 countries)	3.3%	0% – 6.5%	2023
Fiji	5%		2023
French Polynesia	8%		2023
Gabon	10%		2023
Gambia	10%		2023
Georgia	0%		2022 · HS 2017
Ghana	10%		2023
Gibraltar	12%		2023 · HS 2017
Grenada	5%		2023 · HS 2012
Guatemala	5%	0% – 10%	2023
Guinea	10%		2023
Guinea-Bissau	10%		2023
Guyana	5%		2023 · HS 2017
Haiti	0%		2020 · HS 2017
Honduras	5%	0% – 10%	2023
Hong Kong SAR China	0%		2023
Iceland	0%		2023
India	7.5%		2023
Indonesia	5%		2023
Iran	20%		2020 · HS 2017
Israel	0%		2022 · HS 2017
Jamaica	0%		2023
Japan	2.1%	0% – 3.9%	2023
Jordan	0%		2023
Kazakhstan	5%		2023
Kenya	10%		2023
Kiribati	0%		2023 · HS 2002
Kuwait	5%		2023
Kyrgyzstan	5%		2021 · HS 2017
Laos	10%		2023 · HS 2017
Lebanon	0%		2020 · HS 2017
Lesotho	0%		2023
Liberia	10%		2023
Libya	5%		2021 · HS 2017
Liechtenstein	1.7%*		2021 · HS 2017
Macao SAR China	0%		2023
Madagascar	10%		2023
Malawi	10%		2021 · HS 2017
Malaysia	0%		2023
Maldives	15%		2023
Mali	10%		2023
Mauritania	10%		2023 · HS 2017
Mauritius	0%		2023
Mexico	2.5%	0% – 5%	2023 · HS 2017
Micronesia	4%		2021 · HS 2017
Moldova	2.5%	0% – 5%	2023 · HS 2017
Mongolia	5%		2023
Montserrat	15%		2023 · HS 2017
Morocco	2.5%		2023
Mozambique	7.5%		2023
Myanmar (Burma)	3%		2023 · HS 2017
Namibia	0%		2023
Nauru	10%		2021 · HS 2017
Nepal	10%		2023
New Zealand	0%		2023
Nicaragua	5%	0% – 10%	2023
Niger	10%		2023
Nigeria	10%		2023
North Macedonia	0%		2023
Norway	0%		2023
Oman	5%		2023
Pakistan	0%		2023
Palau	3%		2023 · HS 2012
Palestinian Territories	0%		2017 · HS 2017
Panama	0%		2023
Papua New Guinea	0%		2023
Paraguay	4.8%	2% – 12%	2023 · HS 2017
Peru	0%		2023 · HS 2017
Philippines	1%		2023
Qatar	5%		2023
Russia	5%		2021 · HS 2017
Rwanda	10%		2023
Samoa	8%		2020 · HS 2017
São Tomé & Príncipe	10%		2019 · HS 2017
Saudi Arabia	5%		2023
Senegal	10%		2023
Seychelles	0%		2023
Sierra Leone	10%		2023
Singapore	0%		2023 · HS 2017
Solomon Islands	10%		2023 · HS 2017
Somalia	15%		2023 · HS 2017
South Africa	0%		2023
South Korea	6.5%		2023
Sri Lanka	0%		2023
St Kitts & Nevis	5%		2023
St Lucia	5%		2023 · HS 2012
St Pierre & Miquelon	5%		2021 · HS 2017
St Vincent & the Grenadines	5%		2023
Sudan	10%		2021 · HS 2017
Suriname	5%		2023 · HS 2007
Switzerland	1.2%*		2023
Syria	5%		2020 · HS 2012
Tajikistan	6.5%		2021 · HS 2012
Tanzania	10%		2023
Thailand	5%		2023
Togo	10%		2023
Tonga	15%		2023 · HS 2017
Trinidad & Tobago	0%		2023 · HS 2012
Türkiye	3.3%	0% – 6.5%	2023
Tuvalu	0%		2017 · HS 2017
Uganda	10%		2023
Ukraine	1.3%	0% – 2%	2023 · HS 2017
United Arab Emirates	5%		2023
United Kingdom	5.7%	0% – 6%	2023
United States	3.6%	0% – 6.5%	2023
Uruguay	4.8%	2% – 12%	2023 · HS 2017
Uzbekistan	0%		2021 · HS 2017
Vanuatu	5%		2023
Venezuela	5.5%	2% – 12%	2023 · HS 2017
Vietnam	3%		2023
Wallis & Futuna	6%		2021 · HS 2012
Yemen	5%		2017 · HS 2017
Zambia	15%		2023
Zimbabwe	0.1%		2023

Tariff data years 2017–2023; rates may have changed since. * ad valorem equivalent of specific duties (UNCTAD estimate) · UNCTAD TRAINS, accessed via WITS (World Bank)

Classifications and correspondences

Where this HS subheading sits in the United Nations' statistical classifications, and which codes it had in earlier editions of the Harmonized System.

SITC Rev. 4

59889 Other catalysts & catalytic preparations

End use (BEC Rev. 5)

Intermediate goods · BEC 211220

CPC 2.1 product

35499 Other chemical products n.e.c.

ISIC Rev. 4 activity

2029 Manufacture of other chemical products n.e.c.

Earlier HS editions

Correspondence tables of the United Nations Statistics Division (UNSD)

Binding rulings for similar goods 9

Recent rule changes mentioning this code

Acts whose text cites this code or its heading. Check the act itself: a code can be cited for reasons other than a change of its duty.

1. Countervailing duty 26 October 2026

   Certain Amine Compounds From the People's Republic of China: Initiation of Countervailing Duty Investigation

   FR Doc. 2026-21767 · 91 FR 67290 · Source: federalregister.gov

2. Import and export controls 20 July 2026

   Notice of Action: Brazil's Acts, Policies, and Practices Related to Digital Trade and Electronic Payment Services; Unfair, Preferential Tariffs; Anti-Corruption Enforcement; Intellectual Property Protection; Ethanol Market Access; and Illegal Deforestation

   FR Doc. 2026-14542 · 91 FR 45516 · Source: federalregister.gov

3. Quota 1 July 2026

   İthalatta Kota ve Tarife Kontenjanı İdaresine İlişkin Tebliğ (Tebliğ No: 2026/2)’de Değişiklik Yapılmasına Dair Tebliğ (No: 2026/8)

   RG 01.07.2026 sayı 33297 · Tebliğ 2026/2 · Source: resmigazete.gov.tr

4. Tariff change 1 July 2026

   İthalat Rejimi Kararında Değişiklik Yapılmasına İlişkin Karar (Karar Sayısı: 11485)

   RG 01.07.2026 sayı 33297 · Karar 11485 · Source: resmigazete.gov.tr

5. Suspension 30 June 2026 · Applies from: 16 July 2026

   Council Regulation (EU) 2026/1463 of 25 June 2026 amending Regulation (EU) 2021/2278 suspending the Common Customs Tariff duties referred to in Article 56(2), point (c), of Regulation (EU) No 952/2013 of the European Parliament and of the Council on certain agricultural and industrial products

   CELEX 32026R1463 · Source: eur-lex.europa.eu

6. Quota 30 June 2026 · Applies from: 12 July 2026

   Council Regulation (EU) 2026/1465 of 25 June 2026 amending Regulation (EU) 2021/2283 opening and providing for the management of autonomous tariff quotas of the Union for certain agricultural and industrial products

   CELEX 32026R1465 · Source: eur-lex.europa.eu

7. Other 30 June 2026

   Update to Commodity Code structure to maintain dynamic alignment with the EU – 30 June 2026

   Trade Tariff news 6995 · Source: trade-tariff.service.gov.uk

8. Other 24 June 2026

   Update to Commodity Code structure to maintain dynamic alignment with the EU – 24 June 2026

   Trade Tariff news 6929 · Source: trade-tariff.service.gov.uk

Rule changes →

Questions and answers