Sourcing dental alginate powders from China

UK duty on dental alginate impression powders

Read from the UK Trade Tariff on 30 September 2026, heading 3407 covers modelling pastes, dental wax and dental impression compounds in the specified presentations, alongside plaster-based dental preparations. This guide focuses on prepared dental alginate impression powders. See the wider dental impression compound guide for other materials.

The supplied tariff record lists 3407 00 00 00 at 0% duty for goods from China, with no anti-dumping or countervailing measures, tariff suspensions or attached import controls. The powder variants in the table share this single commodity line. Confirm with MHRA which medical-device requirements apply to the clinical impression material.

Give your customs broker the composition, intended dental use and packaging presentation, then confirm the commodity code. Agree the classification before shipment rather than relying on a supplier's generic description of alginate.

Specify mixing, setting and moisture protection

Specify the intended impression use, regular or fast setting, powder-to-water ratio, water temperature, mixing method, working time and setting time. Agree how to assess detail reproduction, elastic recovery and tearing on removal. For colour-changing powders, check that each colour stage corresponds to the stated handling stage. Ask for the manufacturer's disinfection method and permitted delay before pouring the cast.

Agree pack size, moisture-barrier packaging, resealing method, storage conditions and remaining shelf life on delivery. Request formulation identification and performance evidence for the exact powder, including support for any dust-suppression claim. Keep an approved sample and written acceptance criteria for production comparisons.

For supply in Great Britain, the Chinese manufacturer must appoint a UK responsible person, and the device must be registered with MHRA before being placed on the market. For a UKCA route, the manufacturer must sign a declaration of conformity before applying the mark. Obtain documents matching the actual manufacturer and product; arrange testing and certification checks before approving production.

Worked duty example

Illustrative example, not a quote: Illustrative pallet order of sealed dental alginate impression-powder pouches under 3407 00 00 00, invoiced at £20,000 free on board, with £2,500 of freight and insurance to the UK. The customs value is £22,500. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £22,500, so it is £4,500. 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 and documents: compare the manufacturer, formulation identifier, product name and proposed marking with the approved documents. Check registration evidence and the declaration applicable to the chosen route.

Mixing and setting: use the stated ratio and water temperature; record lumping, consistency, working time and setting behaviour against the approved sample. Check colour-stage behaviour where claimed.

Impression performance: inspect reproduced detail, tears and deformation after removal from a test model. Compare casts poured within the manufacturer's stated window, including after the recommended disinfection procedure.

Packaging and traceability: inspect seals, punctures, caking and net contents. Compare batch identifiers, expiry information and instructions across pouches and cartons. Use a quality inspection brief that includes powder performance.

What goes wrong

Moisture entering through a poor seal can leave powder caked and difficult to mix. A changed formulation or different water temperature can shift the working window. An impression may look acceptable but tear on removal or produce a distorted cast after delayed pouring. Check shipped batches using the agreed method.

Generic certificates can refer to another powder or manufacturer. Treat missing or mismatched conformity documents as a reason to hold shipment approval. Resolve the registration and UK responsible person arrangements before supply in Great Britain.

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.