Sourcing thionyl chloride from China

Thionyl chloride duty and controls

Read from the UK Trade Tariff on 29 September 2026, thionyl chloride under 2812 17 00 00 carried 4% duty from China. No anti-dumping or countervailing duty or tariff suspension was recorded for this line. Heading 2812 covers halides and halide oxides of non-metals; see the wider heading guide.

The tariff attaches import and export waste controls. For imports subject to waste notification controls, the exporter must apply to the competent authority in the dispatch country for consent. If buying spent or discarded material from China, ask your customs broker to confirm the applicable waste requirements before shipment.

Confirm the substance identity and composition against the commodity code guidance. This guide covers thionyl chloride as a chemical; a finished battery containing it needs its own classification.

Specify assay, impurities and sealed packaging

Specify thionyl chloride by chemical identity, intended process, assay and test method. Agree limits for sulphur chlorides, sulphuryl chloride and other impurities relevant to your process. Require a batch-specific certificate of analysis rather than a generic specification sheet. Agree compatible containers, closure seals, net contents and the arrangements for sampling without moisture exposure.

Confirm with HSE whether UK REACH registration responsibilities apply to your substance and annual import volume. Direct imports of thionyl chloride also need to be addressed in Chemical Weapons Convention declarations; agree the reporting arrangements with the UK National Authority before ordering. Hazardous chemicals supplied for workplace use require a safety data sheet, and substances must be correctly labelled and packaged before being placed on the market.

Worked duty example

Illustrative example, not a quote: Illustrative order: one tonne of thionyl chloride under 2812 17 00 00, invoiced at £4,000 free on board, with £2,000 of freight and insurance to the UK. The customs value is £6,000. Duty at 4% is £240. Import VAT at 20% is charged on the customs value plus duty, £6,240, so it is £1,248. Import taxes total £1,488; a VAT-registered importer can usually reclaim the VAT, so the lasting cost is the £240 of duty. The import duty and VAT guide explains each step.

Inspection checklist

Identity: match the chemical name and batch reference across the order, container labels, safety data sheet and analysis certificate.

Analysis: compare batch results and test methods with the agreed assay and impurity limits; arrange independent testing through a laboratory equipped to handle thionyl chloride.

Containers: check seals, closures, corrosion, staining and damage without opening containers during a routine warehouse inspection.

Receipt: reconcile container counts and declared net contents, record batch references and follow the safety data sheet for handling. Arrange inspection around these checks.

What goes wrong

A generic purity claim can hide impurities that affect the buyer's reaction. A certificate for a different batch provides no evidence about the shipped material. Moisture exposure through poor closures can degrade thionyl chloride and generate hazardous fumes; plan sampling with the receiving laboratory rather than opening containers casually.

Another failure is treating the supplier's paperwork as the complete import compliance position. Resolve registration, chemical declaration reporting and receiving arrangements before dispatch. Hold damaged containers or batches with conflicting documents out of use while the discrepancy is investigated.

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.