Sourcing ortho-toluenesulphonamide from China
Ortho-toluenesulphonamide from China has a 6% base UK duty, with a conditional suspension to 0%. The suspension excludes mixtures and preparations. For supply in Great Britain, correct chemical labelling and packaging are required; check the UK REACH registration route before ordering. Cambridge China Bridge sources ortho-toluenesulphonamide.
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Base duty and the suspension
Read from the UK Trade Tariff on 5 October 2026, heading 2935 covers sulphonamides. Ortho-toluenesulphonamide falls within the toluenesulphonamides line, 2935 90 90 20. Its base duty for goods from China is 6%, with an autonomous suspension to 0.00 %. The suspension excludes mixtures, preparations and products made up of different components containing these substances. No anti-dumping or countervailing measure is recorded for this line.
The tariff attaches export controls on dangerous chemicals and waste. HSE states that imports have no prior informed consent notification obligation. Ask your customs broker to confirm whether any listed-chemical requirements apply to the exact composition. Waste shipment controls apply only where the material is waste; confirm the applicable route with your broker before ordering recovered or discarded material from China.
Confirm the commodity code using the substance identity, composition and intended presentation. The table repeats the shared tariff code for specification variants, rather than separate tariff lines. For related coverage, see para-toluenesulphonamide. Use the import duty and VAT guide when comparing the base rate with a correctly claimed suspension.
| Goods | Commodity code | Duty | Anti-dumping or countervailing duty on China |
|---|---|---|---|
| Ortho-toluenesulphonamide, technical grade | 2935 90 90 20 | 6% | None |
Specify the ortho isomer and its impurity profile
Write ortho-toluenesulphonamide explicitly in the purchase specification. Agree the substance identifier, assay method, allowable para-isomer content, other impurities, residual solvents, water content, particle size and appearance. Request a batch-specific certificate of analysis showing results rather than a generic statement that the material passes.
Agree sealed, moisture-resistant packing, batch identification and a retained sample. Trial the approved sample in your own process before accepting bulk supply. For ordinary industrial uses, ask HSE to confirm whether UK REACH registration applies to your annual import volume and whether an exemption applies; registration is per substance and legal entity. Confirm your registration route before shipment.
Worked duty example
Illustrative example, not a quote: Illustrative order: one tonne of technical-grade ortho-toluenesulphonamide under 2935 90 90 20, 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: check that the invoice, container labels and analysis certificate all identify the ortho material and the same batch.
Laboratory: independently check assay, para-isomer content, water and residual solvents against the agreed specification.
Packing: check seals, liners, staining, leakage and caking on arrival. Correct chemical labelling and packaging are required before placing substances on the Great Britain market.
Documents: compare the safety data sheet with the composition and batch evidence, and check the basis for the suspension claim. Arrange testing and certification around the agreed chemical specification.
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What goes wrong
A description saying only toluenesulphonamide leaves the isomer composition unresolved. A total assay can look acceptable while hiding more para material than your process allows. Moisture, caking or a changed particle-size distribution can also make an approved sample unrepresentative of the delivered batch.
Avoid accepting a generic analysis certificate or assuming that a formulated product qualifies for the suspension. Hold material that differs from the agreed specification, preserve representative samples and resolve the discrepancy before use. See quality inspection explained.
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 ortho-toluenesulphonamide from China?
The base rate is 6% under 2935 90 90 20, with a conditional suspension to 0.00 %. The suspension excludes mixtures, preparations and products made up of different components containing the substance.
Can I buy mixed ortho and para material instead?
Specify the isomer composition before buying. Do not assume mixed material meets an ortho-only specification or qualifies for the suspension; ask your broker to confirm classification and eligibility.
Do I need UK REACH registration?
For ordinary industrial uses, ask HSE to confirm whether registration is required for your annual import volume and whether an exemption applies. Confirm the route for your substance and importing business before shipping.
What should the analysis certificate show?
Ask for batch-specific assay, para-isomer content, other agreed impurities, water and residual solvents, with test methods. Check particle size separately where it affects your process.