Sourcing DNA extraction reagent kits from China

Duty and ingredient-dependent import controls

Read from the UK Trade Tariff on 1 October 2026, heading 3822 covers prepared diagnostic or laboratory reagents, including kits, and certified reference materials. The table shows research-use extraction kit variants sharing the same tariff line. It is a classification starting point: send the complete formulation, component list and intended use to your broker. See PCR master mixes and the wider reagent heading.

All supplied lines carry 0% duty for goods from China, with no anti-dumping or countervailing duty and no suspension listed. The supplied entry for 3822 90 00 00 attaches veterinary control and an ozone-depleting-substance restriction. Ask your broker to confirm the veterinary requirement for the actual Chinese kit, especially animal-derived ingredients. Where an import information note applies, its conditions must be followed. Importing ozone-depleting substances into Great Britain requires a licence.

Obtain ingredient origins and a statement on ozone-depleting substances before shipping; ask the broker which declarations and documents apply. Do not assume that a laboratory kit is exempt because it is research-only. Confirm the commodity code against the complete kit rather than its trade name.

Specify the extraction method and intended use

Specify the sample matrix, input quantity, silica-column or magnetic-bead method, manual or automated workflow, and compatible equipment. Agree acceptance criteria for DNA recovery, purity, fragment integrity and downstream amplification using your own representative samples. List buffers, enzymes, columns or beads, collection vessels and any additions the buyer must supply.

Set storage conditions for each component, transport arrangements, remaining shelf life at receipt and the evidence supporting those claims. Request lot-specific certificates of analysis, English instructions and safety data sheets for the buffers. Classification and labelling of substances or mixtures must be carried out by someone with scientific competence.

Settle research-only or diagnostic use in the specification and sales material. Confirm appropriate research-only labelling and claims with MHRA. For reagents intended for diagnosis, ask MHRA to confirm the applicable marking and registration route and any arrangements required for an overseas manufacturer before sale in Great Britain.

Worked duty example

Illustrative example, not a quote: 500 research-use DNA extraction reagent kits; illustrative order only under 3822 90 00 00, invoiced at £5,000 free on board, with £300 of freight and insurance to the UK. The customs value is £5,300. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £5,300, so it is £1,060. 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

Contents: check every buffer, enzyme, column or bead container against the agreed packing list, including fill quantities, seals and any separately packed temperature-sensitive components.

Batch records: match component lots to the kit records, certificate of analysis, expiry dates and agreed remaining shelf life; check storage and transport records against the manufacturer's instructions.

Extraction performance: test representative samples and a blank extraction against the agreed recovery, purity and amplification criteria; investigate contamination or inhibition before accepting the lot.

Labels and instructions: check intended use, manufacturer details, batch identification and English instructions. For diagnostic products, verify the applicable marking and registration documents. Arrange quality inspection around these checks.

What goes wrong

A kit demonstrated on clean samples may give poor recovery from your tissue or plant material. Residual wash buffer, incomplete lysis or bead carry-over can affect downstream amplification. Compare trial extractions with your established method and agree how failed lots will be investigated.

Orders also fail through missing components, incompatible automation consumables, short expiry dates or unsuitable transport. Diagnostic claims on research-only packaging create a separate problem. Approve the component list, sample validation, intended-use wording and ingredient-origin paperwork before the shipment leaves China.

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.