Subheading · Chapter 28 · Heading 2833
2833.21: Sulphates; alums; peroxosulphates (persulphates): other sulphates, of magnesium
Official description Of magnesium
2833.21 is a six-digit subheading of heading 2833, sulphates; alums; peroxosulphates (persulphates), chapter 28.
What you pay
Importing into UK
Rates by national line · UK Global Tariff
UK lines →- 2833 21 00 00 Of magnesium 4%
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 2
- Additional dutyAdditional duties 35%
- Applies to goods from
- Belarus, Russia
- Legal act
- 2022 No. 833
- Documents
- Duty suspensionSuspension - goods for certain categories of ships, boats and other vessels and for drilling or production platforms Free
- Applies to goods from
- all countries
- Legal act
- 2020 No. 1431
- Documents
- C990 End use authorisation ships and platforms (Column 8c, Annex A of Delegated Regulation (EU) 2015/2446)
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
- Import controlImport control on restricted goods and technologies
- Applies to goods from
- Iran
- Legal act
- S.I. 2019/461
- 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)
- 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
Preferential rates by country
| Agreement or scheme | Countries | Rate |
|---|---|---|
| standard rate (no agreement) | — | 4% |
| 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 |
|---|---|---|---|
 Germany | £4.3m | 53.2% | +1.8% |
 China | £2.9m | 35.7% | -29.2% |
 India | £463k | 5.7% | -8.5% |
 Netherlands | £130k | 1.6% | +148.2% |
 Czechia | £75k | 0.9% | -5.5% |
 Türkiye | £71k | 0.9% | -40.4% |
 United States | £58k | 0.7% | +162.2% |
 Japan | £49k | 0.6% | -35.6% |
Same subheading in other tariffs
World trade in 2024
Trade value (US$) no reported trade < US$138kUS$138k+US$698.2k+US$5.8m+> US$38.3m
Exports: 86
- China: US$150.1m
- Germany: US$97m
- Ireland: US$38.3m
- India: US$13.6m
- Poland: US$8.6m
- United States: US$8.4m
- Japan: US$7.9m
- Türkiye: US$6.1m
- Czechia: US$5.8m
- Netherlands: US$3.9m
- France: US$3.3m
- Spain: US$2.6m
- Belgium: US$2.6m
- Egypt: US$2.4m
- Tunisia: US$2m
- Romania: US$1.8m
- Mexico: US$1.5m
- Russia: US$1.3m
- Portugal: US$930.7k
- Malaysia: US$752k
- Lithuania: US$698.2k
- South Africa: US$641.7k
- Vietnam: US$628.5k
- Hong Kong SAR China: US$622.6k
- Chile: US$618.7k
- Colombia: US$594.2k
- Denmark: US$548.8k
- Italy: US$520.7k
- United Kingdom: US$458.2k
- Greece: US$416.5k
- South Korea: US$326.5k
- Peru: US$288.6k
- Guatemala: US$260.2k
- Switzerland: US$259.5k
- Brazil: US$246.8k
- United Arab Emirates: US$212.2k
- Austria: US$211.4k
- Canada: US$204.8k
- Israel: US$190.6k
- Taiwan: US$179.1k
- Latvia: US$146.6k
- Honduras: US$138k
- Singapore: US$129.1k
- Kenya: US$127k
- Mauritius: US$105.2k
- Finland: US$64.1k
- Argentina: US$54.6k
- Morocco: US$53.3k
- Sweden: US$53k
- Hungary: US$52.8k
- Ghana: US$49.4k
- Thailand: US$49.2k
- Australia: US$49k
- Iceland: US$44.8k
- Croatia: US$37.8k
- Slovakia: US$35.8k
- Ukraine: US$30.1k
- Saudi Arabia: US$26k
- Slovenia: US$25.4k
- New Zealand: US$24k
Trade value (US$) no reported trade < US$353.7kUS$353.7k+US$2.3m+US$7.8m+> US$11.3m
Imports: 187
- United States: US$30.2m
- Malaysia: US$17.7m
- Finland: US$14.4m
- Ukraine: US$13.9m
- Poland: US$11.8m
- Netherlands: US$11.3m
- France: US$11.2m
- Canada: US$10.4m
- Brazil: US$10m
- Morocco: US$9.8m
- United Kingdom: US$9.2m
- Italy: US$9m
- Ecuador: US$8.8m
- Thailand: US$8.2m
- Belgium: US$8.2m
- Saudi Arabia: US$8.1m
- Mexico: US$8m
- Peru: US$7.8m
- Spain: US$7.3m
- Indonesia: US$7.2m
- South Korea: US$6.9m
- Bangladesh: US$6.1m
- Chile: US$6m
- Sweden: US$5.8m
- Australia: US$5.4m
- Czechia: US$5.3m
- South Africa: US$4.9m
- Austria: US$4.4m
- Vietnam: US$4.2m
- India: US$3.7m
- Costa Rica: US$3.5m
- Japan: US$3.4m
- Colombia: US$3.4m
- Argentina: US$3.4m
- Kuwait: US$3.3m
- Denmark: US$3m
- Germany: US$3m
- Iran: US$2.9m
- Egypt: US$2.7m
- Iraq: US$2.7m
- Bulgaria: US$2.6m
- Guatemala: US$2.6m
- United Arab Emirates: US$2.4m
- Philippines: US$2.4m
- New Zealand: US$2.3m
- China: US$2m
- Honduras: US$1.9m
- Türkiye: US$1.8m
- Azerbaijan: US$1.7m
- Myanmar (Burma): US$1.7m
- Hungary: US$1.7m
- Côte d’Ivoire: US$1.7m
- Israel: US$1.6m
- Jordan: US$1.5m
- Taiwan: US$1.3m
- Portugal: US$1.3m
- Singapore: US$1.3m
- Switzerland: US$1.3m
- Kenya: US$1.2m
- Nigeria: US$1.2m
Top exporters
| Rank | Country | Value | Share |
|---|---|---|---|
| 1 | China | US$150.1m | 40.7% |
| 2 | Germany | US$97m | 26.3% |
| 3 |  Ireland | US$38.3m | 10.4% |
| 4 | India | US$13.6m | 3.7% |
| 5 |  Poland | US$8.6m | 2.3% |
| 6 | United States | US$8.4m | 2.3% |
| 7 | Japan | US$7.9m | 2.2% |
| 8 | Türkiye | US$6.1m | 1.6% |
| 9 | Czechia | US$5.8m | 1.6% |
| 10 | Netherlands | US$3.9m | 1.1% |
Top importers
| Rank | Country | Value | Share |
|---|---|---|---|
| 1 | United States | US$30.2m | 8.2% |
| 2 |  Malaysia | US$17.7m | 4.8% |
| 3 |  Finland | US$14.4m | 3.9% |
| 4 |  Ukraine | US$13.9m | 3.8% |
| 5 | Poland | US$11.8m | 3.2% |
| 6 | Netherlands | US$11.3m | 3.1% |
| 7 |  France | US$11.2m | 3% |
| 8 |  Canada | US$10.4m | 2.8% |
| 9 |  Brazil | US$10m | 2.7% |
| 10 |  Morocco | US$9.8m | 2.6% |
Binding rulings for similar goods 1
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.
- N325291 U.S. CBP
The tariff classification of potassium nitrate, magnesium sulfate heptahydrate, ammonium dihydrogenorthophosphate, potassium dihydrogenorthophosphate, and potassium sulfate from Japan
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.
- Import and export controls
FR Doc. 2026-14542 · 91 FR 45516 · Source: federalregister.gov
- Tariff change
FR Doc. 2026-11158 · 91 FR 33854 · Source: federalregister.gov
-
Sanctions · Applies from: CELEX 32026R0513 · Source: eur-lex.europa.eu
Subheading 2833.21 is a single line in the UK Global Tariff, where the duty is 4%.
The EU Combined Nomenclature has one tariff line for subheading 2833.21; the duty is 5.5%.
Goods from 174 countries can enter the UK at a preferential rate instead of the standard 4%; 174 of them pay no duty at all, for example under DCTS Comprehensive or European Union.
In the UK, additional duty of 35% applies on top of the customs duty to goods from Belarus and Russia.
In the 12 months to August 2026, the UK imported these goods worth £8.1m (down 12% on the year before), at an average of £0.33 per kg; Germany supplied 53%, followed by China.
World trade in these goods reached US$368.6m in 2024, up 6.5% on 2023.
China was the largest exporter with 40.7% of the total, ahead of Germany.
Questions and answers
What is the HS code for sulphates; alums; peroxosulphates (persulphates): other sulphates, of magnesium?
Sulphates; alums; peroxosulphates (persulphates): other sulphates, of magnesium fall under HS subheading 2833.21, part of heading 2833, in section VI of the Harmonized System.
What is the import duty on sulphates; alums; peroxosulphates (persulphates)… in the UK?
Under the UK Global Tariff, imports under 2833.21 from countries without a preferential agreement are charged at 4%. Preferential rates, anti-dumping duties and VAT are not included.
What is the import duty on sulphates; alums; peroxosulphates (persulphates)… in the EU?
Under the EU Combined Nomenclature, imports under 2833.21 from countries without a preferential agreement are charged at 5.5%. Preferential rates, anti-dumping duties and VAT are not included.
Which country exports the most sulphates; alums; peroxosulphates (persulphates)…?
China, with US$150.1m in 2024 (40.7% of world exports).
Which countries can export these goods 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 4% applies. Pick a country above to see its rate.
Is there anti-dumping duty on these goods?
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 these goods from?
In the 12 months to August 2026, the largest suppliers were Germany (53%), China (36%) and India (6%), out of total imports of £8.1m.