Sourcing calcined alumina powder from China

4% duty for ordinary calcined powder

Read from the UK Trade Tariff on 5 November 2026, heading 2818 covers artificial corundum, aluminium oxide and aluminium hydroxide. Calcined alumina, other than artificial corundum, falls within 2818 20 00 90. The table shows purchasing grades sharing this code, rather than separate tariff lines. For neighbouring products, see the wider alumina guide.

The China duty is 4%, with no anti-dumping or countervailing measure recorded. A 0% suspension is restricted to aluminium oxide specifically for manufacturing automotive catalyst monoliths; it excludes mixtures, preparations and products containing different components. The tariff also attaches import and export waste controls. Confirm their application with your customs broker, especially for recovered powder. In England, waste shipped under notification controls cannot move until the relevant authorities have consented.

Confirm the commodity code using the composition, manufacturing process and intended use. Do not assume that a suspension for activated or fused alumina covers calcined powder. Use the import duty and VAT guide when budgeting the shipment.

Specify chemistry, milling and firing behaviour

State the intended ceramic or refractory application, aluminium oxide content and limits for sodium oxide, iron and silica. Agree particle size distribution, coarse residue, moisture, loss on ignition and bulk density. Name the sampling and test methods so the supplier's certificate and your incoming tests measure the same properties.

Distinguish milled powder from unmilled material and agree how agglomerates are dispersed during particle size testing. Trial the sample in your own formulation and firing process before accepting a production grade. Retain an approved sample and require a certificate of analysis matched to each lot.

An importer bringing in more than one tonne annually should check the UK REACH registration position. Classification and labelling must be carried out by someone with scientific competence. Ask for the safety data sheet and settle the classification before resale.

Worked duty example

Illustrative example, not a quote: Illustrative order: 20 tonnes of calcined alumina powder in lined bags under 2818 20 00 90, invoiced at £18,000 free on board, with £2,200 of freight and insurance to the UK. The customs value is £20,200. Duty at 4% is £808. Import VAT at 20% is charged on the customs value plus duty, £21,008, so it is £4,201.60. Import taxes total £5,009.60; a VAT-registered importer can usually reclaim the VAT, so the lasting cost is the £808 of duty. The import duty and VAT guide explains each step.

Inspection checklist

Chemistry: sample across bags and compare aluminium oxide, sodium oxide, iron and silica with the agreed limits and batch certificate.

Particle size: use the agreed dispersion method and check the distribution and coarse residue, rather than accepting a median result alone.

Packing: check liners, seals, bag weights, moisture and hard lumps on arrival; record damaged bags before unloading.

Traceability: match bag markings, certificates and retained samples to the delivered lot. Set these checks out in the inspection brief.

What goes wrong

A powder can meet the headline alumina assay yet fail because soda content, coarse particles or agglomeration differ from the approved sample. These differences can change slurry behaviour, shrinkage or the fired result. Compare production material with the approved sample using the same preparation and test methods.

Moisture entering damaged liners can produce hard lumps and inconsistent feeding. Keep suspect bags separate while testing. A generic certificate without a matching lot number does not establish the delivered powder's composition; agree replacement or reprocessing terms before ordering.

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.