Sourcing diphenyl ether from China

Diphenyl ether: 0% UK duty

Read from the UK Trade Tariff on 1 October 2026, plain diphenyl ether falls under 2909 30 10 00 within heading 2909, which covers ethers and related compounds. This guide concerns plain diphenyl ether. See the wider ethers guide for other substances.

The supplied tariff record gives Chinese-origin diphenyl ether 0% duty, with no anti-dumping or countervailing duty and no suspension listed. It attaches an export control for waste. The brominated comparison lines also carry dangerous-chemical export controls. These are export entries; ask your customs broker to confirm applicable requirements if the consignment involves waste or subsequent export.

Confirm the commodity code using the chemical identity and full composition. The table includes brominated derivatives only to distinguish them from plain diphenyl ether: their recorded duties range from 0% to 4%. Do not order tetra-, penta- or decabromodiphenyl ethers as substitutes without confirming their persistent-organic-pollutant status and applicable restrictions with the relevant authority. A tariff rate does not establish permission to supply them.

Specify diphenyl ether by identity and assay

Specify plain diphenyl ether, its intended process use and whether you accept any added components. Request a complete composition statement rather than relying on a trade name. Set contractual acceptance criteria for assay by gas chromatography, related aromatic impurities, water, colour and acidity, with agreed sampling and test methods.

Ask for a batch certificate of analysis and agree packaging, seal identification and storage instructions. Compare the offered material with an approved sample in your own process before accepting bulk supply. Keep any blend containing diphenyl ether separate from your specification for the plain substance.

For imports into Great Britain, confirm your UK REACH position when annual imports reach one tonne or more. Registration is per substance, per legal entity. Chemicals must be correctly labelled and packaged before being placed on the market. A safety data sheet is required for hazardous chemicals supplied for workplace use; request it before approving shipment.

Worked duty example

Illustrative example, not a quote: Illustrative small-business order of drum-packed diphenyl ether under 2909 30 10 00, invoiced at £3,500 free on board, with £980 of freight and insurance to the UK. The customs value is £4,480. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £4,480, so it is £896. 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, composition statement, batch certificate and safety data sheet; investigate any reference to a brominated derivative.

Assay: test representative batch samples for diphenyl ether content and agreed impurities, rather than accepting a generic certificate.

Condition: check water, colour and acidity against the agreed specification and record the condition of the material when sampled.

Packaging: check seals, leaks, batch identification and the agreed labels; retain photographs and sample records using the inspection guide.

What goes wrong

A quotation for a diphenyl-ether-containing blend can be mistaken for the plain substance. An incomplete composition statement then leaves the buyer comparing incompatible assays and using the wrong material in their process. Require the supplier to identify added components and explain any difference between the sample and production batch.

Other failure points include cross-contamination from shared equipment, water or colour outside the agreed specification, and certificates that cannot be tied to the delivered batch. Hold discrepant material for investigation. Do not accept a brominated flame retardant as an alternative without confirming its persistent-organic-pollutant status and applicable restrictions with the relevant authority; review the site's wider ethers 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.