Sourcing trimethylgallium from China
Trimethylgallium of at least 99% purity by weight from China carries 6% UK duty, with no suspension or trade remedy recorded in the supplied tariff snapshot. GB supply requires correct chemical labelling and packaging and a safety data sheet for hazardous workplace supply. Cambridge China Bridge sources trimethylgallium.
Trimethylgallium duty and tariff flags
Read from the UK Trade Tariff on 1 October 2026, heading 2931 covers other organo-inorganic compounds. Its named trimethylgallium line, 2931 90 00 58, covers CAS RN 1445-79-0 with purity by weight of 99% or more. Chinese-origin goods carry 6% duty. The supplied record contains no anti-dumping or countervailing measure and no tariff suspension for this line.
The UK Trade Tariff attaches dangerous-chemical and waste export-control flags. Ask your customs broker to confirm their relevance to the proposed movement, particularly any return shipment. HSE states that imports have no PIC notification obligations; this does not settle other chemical duties. Confirm the requirements for your China shipment with the broker before dispatch.
Confirm the commodity code using the composition and batch analysis, particularly for diluted material or a different purity. Only the named trimethylgallium line is shown here because the supplied facts contain no other trimethylgallium-specific line. For the wider heading, see the trimethylchlorosilane guide.
| Goods | Commodity code | Duty | Anti-dumping or countervailing duty on China |
|---|---|---|---|
| Trimethylgallium with purity by weight of 99% or more | 2931 90 00 58 | 6% | None |
Specify impurities and the precursor vessel
Specify trimethylgallium identity, neat material or solution, assay basis, individual trace-metal limits, moisture and oxygen limits, and analytical detection limits. Agree the batch certificate of analysis and acceptance method before ordering. A headline purity result does not establish suitability for your semiconductor process.
Agree vessel material, valve arrangement, outlet connection, fill quantity, tare information and compatibility with your delivery equipment. Request the supplier's leak-test record and handling instructions. Plan receipt and any sampling with a specialist chemical facility; do not open the vessel for routine arrival inspection.
For GB supply, chemicals must be correctly labelled and packaged before being placed on the market. Hazardous chemicals supplied for workplace use need a safety data sheet. Check your UK REACH obligations against the substance, annual quantity and importer role before ordering; some obligations depend on annual tonnage.
Worked duty example
Illustrative example, not a quote: Illustrative process qualification order: 1 kg in a sealed precursor vessel under 2931 90 00 58, 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 6% is £390. Import VAT at 20% is charged on the customs value plus duty, £6,890, so it is £1,378. Import taxes total £1,768; a VAT-registered importer can usually reclaim the VAT, so the lasting cost is the £390 of duty. The import duty and VAT guide explains each step.
Inspection checklist
Identity: match the purchase order, vessel label, batch certificate and safety data sheet to trimethylgallium and the delivered batch.
Analysis: compare the assay, individual impurities, test methods and detection limits with the agreed specification.
Vessel: check externally for damage, disturbed seals, missing valve protection and the wrong outlet connection; refer abnormalities to the receiving specialist.
Traceability: reconcile vessel identification, fill records and shipping documents, and retain the batch acceptance decision.
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What goes wrong
A supplier can meet the overall assay while leaving an impurity unreported at a level relevant to your process. An analysis certificate may describe a production batch without identifying the filled vessel. Specify reporting limits and require a documented link between the batch and the delivered container.
An incompatible valve connection can prevent use even when the chemical meets specification. Missing handling information or damaged packaging can also prevent acceptance by the receiving facility. Agree the receiving checks and rejection procedure before shipment, including specialist arrangements for any return.
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.
Frequently asked questions
What is the UK import duty on trimethylgallium from China?
The supplied tariff snapshot records 6% for trimethylgallium with purity by weight of 99% or more under 2931 90 00 58, with no suspension or trade remedy.
Is 99% purity enough for my semiconductor process?
It meets the purity wording of the named tariff line, but process acceptance needs agreed impurity limits, analytical methods and detection limits.
Can I inspect trimethylgallium by opening the vessel?
Do not open it for routine arrival inspection. Check documents and external condition, and arrange any sampling through a specialist chemical facility.
Does a small trimethylgallium order avoid chemical duties?
Do not decide compliance from a single order's size. Check UK REACH obligations against annual quantity and importer role, alongside labelling, packaging and safety data sheet duties.