Sourcing IBDU fertiliser from China
Isobutylidene diurea fertiliser from China carries 6% UK duty when classified under 3102 90 00 90, with no trade remedy or suspension shown. Confirm GB fertiliser labelling requirements with the relevant authority, and importers should establish their UK REACH registration position before ordering. Cambridge China Bridge sources isobutylidene diurea fertiliser.
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6% duty for the relevant other-nitrogen-fertiliser line
Read from the UK Trade Tariff on 3 October 2026, heading 3102 covers mineral or chemical nitrogenous fertilisers. For isobutylidene diurea fertiliser, 3102 90 00 90 is the candidate line for other nitrogenous fertilisers and mixtures. The table shows product forms sharing that line, rather than separate tariff subdivisions.
The supplied tariff record gives 6% duty for goods from China under this line, with no anti-dumping or countervailing measure, suspension or attached import control. This does not settle the requirements for selling the fertiliser or importing its chemical substances. A changed formulation can change classification.
Confirm the commodity code using the complete composition, nutrient analysis and pack size. Do not accept a supplier's code solely because the product is described as slow-release nitrogen. For the wider heading, see our methylene urea fertiliser guide.
| Goods | Commodity code | Duty | Anti-dumping or countervailing duty on China |
|---|---|---|---|
| Isobutylidene diurea fertiliser, granules | 3102 90 00 90 | 6% | None |
Specify the nitrogen forms in IBDU fertiliser
Write the full chemical identity into the specification. Ask the factory to report total nitrogen, nitrogen from isobutylidene diurea and free ureic nitrogen separately. Agree the analytical methods and obtain a batch analysis. A total-nitrogen result alone does not establish how much nitrogen comes from the intended ingredient.
Specify granule size distribution, fines, moisture, crushing strength and packaging suited to your blending or spreading equipment. Ask for release-performance evidence with the test conditions stated. Agree an acceptance sample and the bag liner, closure and pallet protection before production.
Confirm with the relevant authority which type and nutrient-content declarations are required on fertilisers sold in Great Britain under the applicable fertiliser framework. Check the intended sales route and label with your adviser before printing. For chemical imports, establish the UK REACH position: a new registration, where required, must be complete before imports reach 1 tonne per year.
Worked duty example
Illustrative example, not a quote: Illustrative order: 1 tonne of bagged isobutylidene diurea fertiliser; illustrative FOB and freight values, not a quotation under 3102 90 00 90, invoiced at £9,000 free on board, with £2,500 of freight and insurance to the UK. The customs value is £11,500. Duty at 6% is £690. Import VAT at 20% is charged on the customs value plus duty, £12,190, so it is £2,438. Import taxes total £3,128; a VAT-registered importer can usually reclaim the VAT, so the lasting cost is the £690 of duty. The import duty and VAT guide explains each step.
Inspection checklist
Identity and analysis: draw independent samples across the batch and check chemical identity, total nitrogen, nitrogen from isobutylidene diurea and free ureic nitrogen against the contract.
Physical condition: sieve samples for granule distribution and fines, check moisture and crushing strength, and examine arriving bags for hard lumps or damp product.
Packing and labels: check bag weights, liners, closures, batch identification and the agreed nutrient declaration against the analysis and delivery documents.
Performance: compare the supplied release-test evidence with the agreed method and conditions; retain sealed samples for investigating any subsequent complaint.
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What goes wrong
A product can match total nitrogen while containing more free urea and less isobutylidene diurea than agreed. An analysis headed only 'slow-release fertiliser' leaves this unresolved. Fine material, broken granules and moisture damage can also make a satisfactory laboratory sample unsuitable for the buyer's spreader or blending process.
Check the actual production batch before shipment and compare arrival samples with retained samples. Settle the label and chemical registration position before dispatch. Use our quality inspection guide to arrange sampling and reporting that follow the lot.
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 isobutylidene diurea fertiliser from China?
The supplied tariff record gives 6% under 3102 90 00 90, with no trade remedy or suspension. Confirm that the composition and pack size fit this code.
Does importing IBDU fertiliser require UK REACH registration?
Check your registration position before ordering. Where a new registration is required, it must be complete before imports of the substance reach 1 tonne per year. Substances within mixtures also count.
What should an IBDU fertiliser analysis show?
Ask for chemical identity, total nitrogen, nitrogen from isobutylidene diurea and free ureic nitrogen, with the methods stated. Add moisture and particle-size results against your contract.
Can I use the Chinese factory's fertiliser label?
Have it checked against the applicable GB fertiliser framework. Confirm type and nutrient declaration requirements with the relevant authority; translating the factory label alone does not establish compliance.