Sourcing sodium dimethyl DTC from China

6% duty for the relevant dithiocarbamate line

Read from the UK Trade Tariff on 1 October 2026, heading 2930 covers organo-sulphur compounds. The relevant candidate for sodium dimethyldithiocarbamate is 2930 20 00 90, other thiocarbamates and dithiocarbamates, carrying 6% duty on goods from China. The supplied tariff record shows no anti-dumping or countervailing measure for this line.

The line carries a 0% autonomous suspension limited to other named chemicals. Sodium dimethyldithiocarbamate is not named in its scope, so budget for 6%. Do not apply a neighbouring chemical's relief to this product. For the wider heading, see our sodium ethyl xanthate guide.

The tariff record attaches dangerous-chemical export and waste export controls. Ask your customs broker to confirm their relevance to your goods and movement from China. Separately, importers of chemicals listed under Great Britain's prior informed consent scheme must report annual quantities to HSE; confirm whether your exact substance is listed. Confirm the commodity code using the composition, physical form and intended use.

Specify identity, assay and supply form

Write the full chemical name into the purchase specification. State whether you want solid material or an aqueous solution, identify the hydration state where relevant, and agree whether assay is reported on an as-supplied or dry basis. Specify the assay method, acceptable impurities, appearance, insoluble matter and packaging. Ask for a certificate of analysis tied to the production batch.

Before a first import of this substance into Great Britain, consider whether UK REACH registration is required. Classification and labelling must be carried out by someone with scientific competence. A safety data sheet is required when a hazardous chemical is supplied for workplace use. Request documents matching the actual substance or solution, rather than a generic dithiocarbamate sheet.

Worked duty example

Illustrative example, not a quote: Illustrative trial consignment of sodium dimethyldithiocarbamate under 2930 20 00 90, invoiced at £2,500 free on board, with £980 of freight and insurance to the UK. The customs value is £3,480. Duty at 6% is £208.80. Import VAT at 20% is charged on the customs value plus duty, £3,688.80, so it is £737.76. Import taxes total £946.56; a VAT-registered importer can usually reclaim the VAT, so the lasting cost is the £208.80 of duty. The import duty and VAT guide explains each step.

Inspection checklist

Identity: match the chemical name, supply form and batch references across the order, container labels and certificate of analysis.

Assay: compare a representative batch sample with the agreed method and reporting basis; for solutions, check active concentration separately from total solids.

Condition: check solids for caking and contamination, or solutions for unexpected sediment and separation, against the agreed specification.

Packaging: inspect closures, seals and containers for leakage or damage; match the delivered quantity and safety documents to the batch.

What goes wrong

An assay can look acceptable while being reported on a different basis from the order. A solution's total solids result can also be mistaken for active chemical content. Resolve these differences before approving the batch, and retain an agreed sample for comparison.

Other problems include substituted supply forms, certificates referring to another batch and leaking containers. Keep affected stock separate while investigating, and approve changes to concentration, formulation or packaging before dispatch.

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.