Sourcing lithium carbonate from China

Lithium carbonate duty and impurity thresholds

Read from the UK Trade Tariff on 5 November 2026, heading 2836 includes lithium carbonate under 2836 91 00 20 and 2836 91 00 90. Both have a third-country duty of 4%; the former has an autonomous suspension to 0%. The supplied tariff snapshot lists no anti-dumping or countervailing duty for these lines.

The suspended line covers lithium carbonate meeting the listed impurity thresholds using European Pharmacopoeia methods. Examples include sodium at 300 mg/kg or more and calcium at 200 mg/kg or more. Ask your broker to match the complete batch analysis to the description before claiming the suspension. Confirm the commodity code; see soda ash and carbonates for the wider heading.

The tariff attaches import and export waste controls to both lines. For material shipped from China as waste, confirm the applicable requirement with your customs broker and the competent authority before dispatch. For notified waste entering England, shipment must wait for consent from the destination, dispatch and transit authorities. The waste flag is a reason to establish the material's status, rather than assume ordinary chemical stock follows a waste procedure.

Specify assay, impurities and intended use

Describe the intended process, rather than ordering only by a supplier's grade name. Agree lithium carbonate assay, moisture, particle size and individual impurity limits. Ask for batch results for sodium, potassium, calcium, magnesium, iron, arsenic, chlorides, sulphates and heavy metals, with test methods and reporting limits. A headline purity result alone is insufficient for comparing the batch with the tariff description.

Request a batch certificate of analysis, safety data sheet and agreed packaging specification. Confirm with HSE or your customs broker how your annual import volume affects your UK REACH position. Registration is per substance, per legal entity. Everyone in the chemical supply chain is responsible for correct labelling and packaging before placing substances or mixtures on the Great Britain market.

Worked duty example

Illustrative example, not a quote: Illustrative order: one tonne of lithium carbonate; illustrative FOB and freight values under 2836 91 00 90, invoiced at £22,000 free on board, with £2,500 of freight and insurance to the UK. The customs value is £24,500. Duty at 4% is £980. Import VAT at 20% is charged on the customs value plus duty, £25,480, so it is £5,096. Import taxes total £6,076; a VAT-registered importer can usually reclaim the VAT, so the lasting cost is the £980 of duty. The import duty and VAT guide explains each step.

Inspection checklist

Batch identity: match bag markings, certificate, invoice and retained samples to the same production lot.

Analysis: sample across the lot for independent assay, moisture and impurity checks against the purchase specification and declared tariff line.

Packaging: inspect liners, closures and bags for tears, dampness, contamination and caking; check net weights.

Supply documents: compare the safety data sheet with the actual material and check agreed labels and packaging before release. Arrange quality inspection around these checks.

What goes wrong

A grade name or headline assay can conceal an unacceptable sodium, calcium or iron result. A certificate from a different batch can also leave the shipment's quality and tariff classification unresolved. Damp or damaged packaging can introduce caking or contamination. Agree sampling, independent testing and rejection criteria before paying for shipment.

Do not accept a substituted grade merely because it appears to attract lower duty. The material must still meet your process specification. Hold an unmatched or failed batch apart from accepted stock while the supplier explains the discrepancy and provides evidence.

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.