Sourcing butadiene diepoxide from China

Duty and classification for butadiene diepoxide

Read from the UK Trade Tariff on 5 October 2026, heading 2910 covers epoxides and related compounds with a three-membered ring. For butadiene diepoxide, consider the residual other-epoxides line, 2910 90 00 90. The supplied tariff facts contain no dedicated butadiene diepoxide line, so the table contains only this candidate rather than unrelated chemicals.

The candidate line carries 0% duty for goods from China. The supplied facts show no anti-dumping or countervailing measure and no suspension. They attach a waste export control. Ask your customs broker to confirm its relevance to the consignment, particularly if the material is waste, recovered stock or a return shipment.

Give your broker the chemical identity, composition, physical form and intended use to confirm the commodity code. A solution needs its own classification review. For the wider product family, see epichlorohydrin and epoxides.

Specify identity, stereochemistry and assay

Specify butadiene diepoxide by chemical identity and structure, not just the supplier's English name. State whether you require a particular stereoisomer or an agreed mixture. Distinguish the neat chemical from a solution, and record any solvent, concentration and additives.

Agree assay, water content, impurity reporting and the analytical methods before approving a sample. Ask for a batch certificate of analysis and chromatogram. Specify container material, closure, pack size and storage conditions against the supplier's documented stability information.

For Great Britain, chemicals must be classified and labelled under the applicable chemical classification rules, and correctly packaged before market supply. Assess your UK REACH registration position, including the annual tonnage and any only-representative coverage. A hazardous chemical supplied for workplace use requires a safety data sheet.

Worked duty example

Illustrative example, not a quote: Illustrative laboratory reagent consignment in sealed small packs under 2910 90 00 90, invoiced at £24,000 free on board, with £3,500 of freight and insurance to the UK. The customs value is £27,500. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £27,500, so it is £5,500. With no duty, the only import tax is the VAT, which a VAT-registered importer can usually reclaim. The import duty and VAT guide explains each step.

Inspection checklist

Identity: match the purchase specification, container label, safety data sheet and batch certificate; check the stated stereoisomer composition.

Assay: have a laboratory compare purity, water and the impurity profile with the approved specification using the agreed methods.

Packaging: inspect closures, seals and container condition for leakage or damage; compare packing and storage instructions with the safety data sheet.

Traceability: match each pack to the batch certificate and retain the analytical results before releasing stock. Plan the checks through testing and certification.

What goes wrong

A certificate headed only 'diepoxide' can conceal a different chemical, a different stereoisomer mixture or a diluted product. An assay result without its method and impurity profile is difficult to compare with the approved sample. Make those details part of the purchase specification.

A low duty rate does not resolve chemical supply duties. Hold stock with conflicting identity documents, damaged packaging or unexplained analytical differences pending specialist review. Agree sampling and release decisions before shipment using the quality inspection guide.

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.