Sourcing Magnesium Carbonate from China

Magnesium carbonate: 0% UK duty

Read from the UK Trade Tariff on 5 November 2026, magnesium carbonate under 2836 99 11 00 carries 0% duty for goods from China. The supplied record shows no anti-dumping or countervailing duty and no suspension. Heading 2836 covers carbonates and peroxocarbonates; this guide covers magnesium carbonate. The buyer descriptions in the table share the same tariff line.

The tariff attaches import and export waste controls. Waste shipment controls apply only when the material is waste. For a notified waste shipment from China to England, the exporter must seek consent through the dispatch country's competent authority; shipment requires consent from the Environment Agency and the other competent authorities involved. Confirm the applicable waste procedure with your customs broker before shipping.

Give your broker the composition, manufacturing description and intended use to confirm the commodity code. Do not assume a formulated chalk product has the same classification as the chemical powder. For other products in this heading, see soda ash and carbonates.

Specify the carbonate, density and intended use

State whether you want light, heavy or basic magnesium carbonate, and ask the factory to describe its actual composition. Agree assay, the basis on which it is reported, moisture, particle size, bulk density and impurity limits. A commercial grade name alone is too vague for comparing quotations.

For grip powder, compare feel, dustiness and clumping against an approved sample. For industrial use, test dispersion and performance in your process. Request a batch certificate of analysis with the test methods. This guide addresses chemical powder; agree a separate assessment before ordering material for food or medicinal use.

Before placing imported chemicals on the Great Britain market, check classification, labels and packaging under GB CLP. Establish your UK REACH position before ordering: HSE's new-registration guidance requires registration for GB-based entities importing a substance at or above 1 tonne per year, subject to the applicable registration arrangements.

Worked duty example

Illustrative example, not a quote: 1 tonne of magnesium carbonate powder, illustrative under 2836 99 11 00, invoiced at £4,000 free on board, with £2,500 of freight and insurance to the UK. The customs value is £6,500. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £6,500, so it is £1,300. 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 product description, grade and batch references across the order, bags and certificate; check that the supplied composition matches the approved sample.

Analysis: test representative batch samples against the agreed assay, moisture and impurity limits, using the agreed methods and reporting basis.

Powder behaviour: check particle size, bulk density, visible contamination and hard lumps; compare handling and performance with the approved sample.

Packing: inspect liners, seals and bags for tears or dampness, check net weight and retain batch samples. Arrange testing and certification around the intended use.

What goes wrong

A supplier quotes a familiar grade name but delivers material with different density, particle size or composition. The certificate reports assay on a different basis from the purchase specification, so apparently matching results do not prove the goods match. Agree the reporting basis and test a sample before approving production.

Damp packing can leave powder clumped on arrival, while a generic certificate can hide batch differences. Photograph damaged bags, record affected batch references and hold suspect material apart pending testing. Agree acceptance criteria and the evidence needed for a replacement or credit before paying the balance.

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.