Sourcing boron-selective resins from China

0% UK duty on boron-selective resin

Read from the UK Trade Tariff on 4 October 2026, heading 3914 covers ion-exchangers based on polymers of headings 3901 to 3913, in primary forms. Boron-selective polymer resin beads belong within the scope of the other line, 3914 00 00 90, subject to confirmation of the formulation and supplied form. See the wider ion-exchange resin guide.

The supplied tariff record shows 0% duty for goods from China on the relevant line, with no anti-dumping or countervailing duty and no suspension listed. The separate named suspension of nickel-loaded agarose and ethanol is outside this guide's product scope, so the table contains only the relevant line.

The tariff attaches waste import and export controls. For spent resin from China imported into England under notification controls, the exporter must apply to the dispatch country's competent authority for consent. Confirm the waste classification and shipment requirements with your customs broker before arranging transport. Fresh resin and spent waste resin need separate checks. Confirm the commodity code using the composition and form supplied.

Specify boron removal under your operating conditions

Specify the polymer matrix, boron-binding functional group, supplied chemical form, bead size distribution, water retention and packing volume basis. Give the supplier your feed-water boron concentration, target outlet concentration, acidity or alkalinity, salinity, competing dissolved substances, temperature and operating flow. Ask for boron-specific performance data under those conditions rather than accepting a general ion-exchange capacity figure.

Agree a column trial using your water, the point at which outlet boron exceeds your agreed target, and the regeneration and rinsing procedure. Compare fresh and regenerated performance using the same method. Ask for batch analysis, storage instructions and evidence supporting the intended drinking-water or industrial use.

GB importers are responsible for chemical classification. For substances you have not previously imported, consider whether UK REACH registration is required. Obtain composition information and ask for the supplier's safety documentation. For public-water treatment in England and Wales, confirm the applicable approval route with DWI; applications for ion-exchange resin approval use the filter media application form.

Worked duty example

Illustrative example, not a quote: Illustrative order: 20 sealed 25-litre drums of new boron-selective resin; monetary values are illustrative. under 3914 00 00 90, invoiced at £18,000 free on board, with £1,500 of freight and insurance to the UK. The customs value is £19,500. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £19,500, so it is £3,900. 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 delivered grade, functional group description, supplied form and batch identifiers to the approved sample and purchase specification.

Boron performance: test a representative sample in a column using the agreed feed water and flow; record inlet and outlet boron through loading and after regeneration.

Bead condition: check particle size, cracked beads, fines and water retention against the agreed specification; retain samples for comparison with later batches.

Packing and rinsing: check seals, moisture condition, production date and storage history; rinse a sample and inspect the effluent for colour and odour. Use the quality inspection guide to define the inspection scope.

What goes wrong

A supplier may offer a general chelating or anion resin as an equivalent without showing boron-specific results. A capacity figure measured in favourable laboratory water can conceal poor performance in your actual feed. Treat equivalence as unproven until the candidate resin passes the agreed column trial.

Cracked beads, fines and moisture loss can undermine service performance. Incomplete regeneration or rinsing can also make a satisfactory fresh sample misleading. Check regenerated performance and rinse-water quality, and keep batch samples. Public-water approval and chemical classification need their own checks alongside the performance trial.

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.