Sourcing gentamicin active ingredient from China

Gentamicin duty and commodity classification

Read from the UK Trade Tariff on 5 October 2026, heading 2941 covers antibiotics as active substances. Gentamicin belongs under the other-antibiotics line, 2941 90 00 00, subject to confirmation of the supplied composition. The supplied tariff contains only this relevant line, so the table has a single entry. See the wider antibiotic guide for other antibiotic families.

Goods from China on this line carry 0% duty. The supplied tariff records no anti-dumping or countervailing duty and no suspension. It attaches an export control for waste. Waste shipment controls apply only where the material is waste; ask your customs broker to confirm the attached measure's relevance, particularly before arranging a rejected batch's return to China.

Confirm the commodity code using the chemical form, composition and presentation. Finished medicines require a separate classification assessment. Allow for 20% import VAT and use the duty and VAT guide when calculating border charges.

Specify the gentamicin form and potency basis

State whether you want gentamicin or gentamicin sulphate, the intended use and the agreed pharmacopoeial specification. Ask the manufacturer to explain how potency is expressed, including the moisture correction and whether the result refers to gentamicin activity or the supplied salt. Agree methods and acceptance criteria for identity, potency, component profile, related substances and water content before approving a sample.

For human medicines, UK active-substance importers must register with the MHRA. Confirm the applicable good manufacturing practice standards with the MHRA. Check the actual manufacturing site and the scope of its evidence. Before shipment, confirm with the MHRA whether written confirmation from the exporting country's authority is needed. For veterinary use, confirm the applicable requirements with the Veterinary Medicines Directorate.

Worked duty example

Illustrative example, not a quote: Illustrative order: 500 kg of gentamicin sulphate active ingredient under 2941 90 00 00, invoiced at £25,000 free on board, with £1,500 of freight and insurance to the UK. The customs value is £26,500. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £26,500, so it is £5,300. 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 salt form, manufacturer, batch number and container labels to the purchase specification and certificate of analysis.

Potency: check the reporting basis and analytical method against the agreed specification; arrange batch testing rather than relying on the supplier's headline assay.

Impurities: review the component profile and related-substance results; agree with your quality team whether additional process-residue testing is appropriate.

Packaging: check seals, liners, moisture damage and transport records against the agreed storage conditions before accepting the material.

What goes wrong

A quotation for gentamicin sulphate can be compared with another quotation on a different potency basis, making apparently equivalent material unsuitable for the buyer's process. A sample certificate can also be reused for a different production batch. Put the form, analytical basis and batch-document requirements into the purchase specification.

For medicinal supply, incomplete importer registration or manufacturing evidence can prevent release even when the assay looks satisfactory. Hold material with damaged seals, inconsistent batch records or failed tests for quality review. Before returning rejected stock to China, ask your broker to assess whether it is waste and which shipment controls apply.

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.