Sourcing H12MDI Diisocyanate from China
H12MDI diisocyanate from China has a 6% UK base duty under 2929 10 00 90. Do not assume the code's substance-specific 0% suspension applies. For Great Britain, settle UK REACH registration coverage and diisocyanate user training before supply or use. Cambridge China Bridge sources H12MDI diisocyanate.
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H12MDI: budget for 6% duty
Read from the UK Trade Tariff on 1 October 2026, heading 2929 covers compounds with other nitrogen function. Monomeric H12MDI belongs within the residual isocyanate line, 2929 10 00 90, subject to confirmation of the actual composition. The table shows application descriptions sharing that line, rather than separate tariff categories.
The supplied line carries 6% duty for goods from China, with no anti-dumping or countervailing measure recorded. Its 0% autonomous suspension is limited to named substances. The supplied footnote is truncated, so budget at 6% and have your customs broker check the complete wording before claiming relief. The snapshot also attaches an export control for waste; confirm its applicability with your broker if waste is involved.
Confirm the commodity code using the substance identity, composition and whether the product is a monomer, prepolymer or formulated preparation. Do not apply the monomer code automatically to modified products. For related coverage within this heading, see isophorone diisocyanate.
| Goods | Commodity code | Duty | Anti-dumping or countervailing duty on China |
|---|---|---|---|
| Monomeric H12MDI for coatings | 2929 10 00 90 | 6% | None |
Specify H12MDI identity and isomer profile
Write out hydrogenated methylene diphenyl diisocyanate alongside H12MDI and request the supplier's substance identifier. Specify monomer content, isomer profile, isocyanate-group content, water, acidity, hydrolysable chlorine and colour. Agree test methods and acceptance criteria against your formulation trial, rather than accepting a generic statement of purity.
Request a batch certificate of analysis, sealed dry packing, handling instructions and an agreed storage temperature range. For Great Britain, confirm with HSE the UK REACH registration coverage needed for your substance and supply arrangement. Employers must ensure successful safe-use training before employees use diisocyanates. Confirm applicable workplace exposure control requirements under COSHH with HSE.
Worked duty example
Illustrative example, not a quote: Sealed drums of monomeric H12MDI for a formulation trial, illustrative only under 2929 10 00 90, invoiced at £4,000 free on board, with £980 of freight and insurance to the UK. The customs value is £4,980. Duty at 6% is £298.80. Import VAT at 20% is charged on the customs value plus duty, £5,278.80, so it is £1,055.76. Import taxes total £1,354.56; a VAT-registered importer can usually reclaim the VAT, so the lasting cost is the £298.80 of duty. The import duty and VAT guide explains each step.
Inspection checklist
Identity: match the order, drum labels and batch certificate to monomeric H12MDI; investigate any document describing aromatic MDI, a prepolymer or a blend.
Analysis: compare independent results for isocyanate-group content, isomer profile, water, acidity and colour with the agreed specification. Use testing and certification support to arrange the checks.
Packing: check closures, seals, leakage, corrosion and journey temperature records against the agreed packing and handling instructions.
Safety documents: obtain an English safety data sheet and reconcile it with the supplied substance. Suppliers must provide a safety data sheet for products dangerous for supply; supply-chain businesses must ensure correct labelling and packaging before sale.
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What goes wrong
A quotation saying only MDI leaves the hydrogenated product unclear. An unagreed isomer profile, moisture contamination or changed acidity can undermine the formulation trial. Treat unexpected solids, damaged seals or inconsistent batch documents as reasons to hold the lot for investigation before production.
Customs problems arise when buyers assume every substance under the residual code receives its suspension. Supply and use also need their own safety checks. Review the batch before release using our inspection guide, and resolve substance identity or safety-document discrepancies with the producer.
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 H12MDI from China?
The supplied tariff snapshot gives 6% base duty under 2929 10 00 90. Its 0% suspension is substance-specific; budget at 6% until your broker confirms eligibility against the complete footnote.
Is H12MDI the same product as ordinary MDI?
H12MDI is hydrogenated MDI. Specify the full substance identity, monomer content and isomer profile, and approve a sample in your formulation before ordering.
Do I need UK REACH registration for H12MDI?
For Great Britain, confirm with HSE what UK REACH registration coverage is needed. Check whether your own registration or coverage through the manufacturer's appointed only representative is appropriate for your supply arrangement.
Do workers need training before using H12MDI?
Employers must ensure successful training on safe diisocyanate use before use. Confirm training for the actual handling task and arrange workplace exposure controls.