Sourcing potassium superoxide from China
Potassium superoxide falls within the sodium or potassium peroxides line, carrying a flat 4% UK duty from China, with no listed trade remedy or suspension. Before supply in Great Britain, ensure correct chemical labelling and packaging and establish the UK REACH position. Cambridge China Bridge sources potassium superoxide.
Potassium superoxide duty
Read from the UK Trade Tariff on 1 October 2026, heading 2815 covers sodium hydroxide, potassium hydroxide and peroxides of sodium or potassium. The relevant peroxide line is 2815 30 00 00, carrying 4% duty for goods from China. The supplied tariff record lists no anti-dumping or countervailing measure and no suspension.
The tariff attaches import and export waste controls. For a China shipment that is waste and subject to notification controls, shipment to England can start only after consent from the Environment Agency and the other competent authorities involved. Ask your customs broker to confirm the applicable requirements for the material and route, including any proposed return shipment.
Confirm the chemical identity, composition and supplied form before selecting the commodity code. This record contains only one relevant commodity line, so the table does not add unrelated hydroxides. For the wider product family, see our potassium peroxide guide.
| Goods | Commodity code | Duty | Anti-dumping or countervailing duty on China |
|---|---|---|---|
| Potassium superoxide, within the sodium or potassium peroxides line | 2815 30 00 00 | 4% | None |
Specify superoxide identity and batch performance
Write potassium superoxide explicitly in the purchase specification. Ask the factory to distinguish it from potassium peroxide and potassium hydroxide, and provide a batch certificate showing assay, impurity results and analytical methods. Agree powder or granule form, particle size, permitted fines and the acceptance test for your intended process.
Agree sealed packaging, closure construction, storage instructions and a sampling procedure with the supplier and a specialist handler. Ask a specialist carrier to confirm the transport classification and packing before booking. Correct labelling and packaging are responsibilities throughout the chemical supply chain before sale in Great Britain.
Establish the UK REACH position before ordering. For planned imports of one tonne or more a year, confirm with HSE whether registration coverage is required and whether an only representative can cover your imports. Ask for the English safety data sheet and check that its identity and handling instructions match the actual product.
Worked duty example
Illustrative example, not a quote: Illustrative order: 25 kg of potassium superoxide in specialist sealed packaging under 2815 30 00 00, invoiced at £3,000 free on board, with £1,000 of freight and insurance to the UK. The customs value is £4,000. Duty at 4% is £160. Import VAT at 20% is charged on the customs value plus duty, £4,160, so it is £832. Import taxes total £992; a VAT-registered importer can usually reclaim the VAT, so the lasting cost is the £160 of duty. The import duty and VAT guide explains each step.
Inspection checklist
Identity: match the purchase specification, package labels, safety data sheet and batch certificate to potassium superoxide.
Batch results: check assay, named impurities, analytical methods and particle size against the agreed acceptance criteria.
Packaging: inspect closures, seals and outer containers for damage or leakage without opening containers outside the agreed handling procedure.
Traceability: match package batch references to the certificate and retain the inspection record. Arrange testing and certification support for the agreed analytical checks.
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What goes wrong
A quotation describing only potassium peroxide can leave the ordered chemical identity unclear. A certificate reporting a generic active-oxygen result may also leave the superoxide assay unresolved. Specify the substance and analytical method rather than accepting a similar product name or a certificate for another batch.
Damaged seals, excessive fines and inconsistent documents can make an otherwise acceptable order unsuitable for the buyer's process. Agree how damaged packages and disputed results will be handled before dispatch, and arrange sampling through a laboratory familiar with the material.
Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification. For repeat volumes, see container programmes.
Frequently asked questions
What is the UK import duty on potassium superoxide from China?
The relevant line, 2815 30 00 00, carries 4% duty in the supplied tariff record. No anti-dumping or countervailing measure or suspension is listed.
Can I order potassium peroxide instead of potassium superoxide?
Specify potassium superoxide explicitly. Ask the supplier to confirm the chemical identity and provide an assay method that distinguishes the ordered substance.
Does potassium superoxide need UK REACH registration?
For planned imports of one tonne or more a year, confirm with HSE the applicable UK REACH registration requirements and whether an only representative can cover your imports. Establish the position for your supply before ordering.
What should I check when potassium superoxide arrives?
Check sealed-container condition, labels and batch references. Compare the batch certificate with the agreed assay and particle-size criteria; use the agreed specialist sampling procedure.