Sourcing Guanidine Hydrochloride from China

Guanidine hydrochloride duty and classification

Read from the UK Trade Tariff on 5 November 2026, heading 2925 covers carboxyimide-function and imine-function compounds and their salts. For guanidine hydrochloride solid, check residual line 2925 29 00 90 with your broker. It carries 0% duty from China, with no anti-dumping or countervailing measure and no suspension shown. The table shows purchasing specifications sharing this candidate line, rather than separate tariff subdivisions.

The supplied tariff record attaches veterinary control to this line, alongside dangerous-chemical and waste export controls. For guanidine hydrochloride from China, ask your customs broker to confirm whether the veterinary requirement applies to the actual material and what documents are needed. Establish the manufacturing route and any animal-derived inputs. The export flags should also be checked if you later export the material.

Confirm the identity, composition and physical form through finding your commodity code, especially for solutions or formulated reagents. See the wider heading guide for other substances. Import VAT is normally 20%; the duty and VAT guide explains the calculation.

Specify assay, moisture and intended use

Specify guanidine hydrochloride by its full chemical identity, solid form and intended laboratory or industrial use. Agree assay, whether results are reported on a dry or as-received basis, water content, insoluble matter, solution clarity and relevant trace metals. For sensitive laboratory work, agree an application test using the buyer's method rather than accepting a grade name alone.

Ask for a batch-specific certificate of analysis, test methods, manufacturing-site identity and sealed moisture-resistant packaging. Check which UK REACH responsibilities apply to your import arrangements. 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.

Worked duty example

Illustrative example, not a quote: Illustrative order: 1 tonne of guanidine hydrochloride solid under 2925 29 00 90, invoiced at £9,000 free on board, with £800 of freight and insurance to the UK. The customs value is £9,800. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £9,800, so it is £1,960. With no duty, the only import tax is the VAT, which a VAT-registered importer can usually reclaim. The import duty and VAT guide explains each step.

Inspection checklist

Identity: match the chemical name, batch reference and manufacturer across the containers, invoice and certificate of analysis.

Analysis: compare assay, water content and agreed impurities with the purchase specification; confirm the reporting basis and test method.

Packaging: inspect seals, liners and closures for damage, leakage or moisture entry; photograph caking or discolouration before sampling.

Performance: test a representative sample for dissolution, clarity and the agreed application; retain a labelled sample linked to the delivery batch.

What goes wrong

An assay result can look acceptable while concealing a different reporting basis or inadequate impurity testing. A generic laboratory-grade description does not establish suitability for the buyer's process. Moisture entry, caking, insoluble material and inconsistent dissolution are useful arrival checks.

A certificate copied from another batch breaks traceability. Hold disputed stock separately, document the container and batch references, and compare a retained sample with the agreed methods before accepting a replacement or changing the specification.

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.