Sourcing estradiol active ingredient from China
Estradiol active ingredient from China falls within the oestrogens and progestogens line at 0% UK duty. For human medicines, UK importers must register with MHRA; ask MHRA to confirm the applicable manufacturing requirements. Confirm the substance, manufacturing site and batch documents before ordering. Cambridge China Bridge sources estradiol active ingredient.
Estradiol active ingredient: 0% duty
Read from the UK Trade Tariff on 13 November 2026, heading 2937 covers hormones and their derivatives and structural analogues. Estradiol active ingredient belongs within the oestrogens and progestogens line, 2937 23 00 00. This focused guide uses the relevant line only; see the wider hormones and steroids guide.
The supplied tariff record shows 0% duty for goods from China, no anti-dumping or countervailing measure and no suspension on this line. It attaches Home Office controlled-drug export and waste export controls. These are export entries; ask your customs broker to confirm their applicability before returning or re-exporting material.
Confirm the exact chemical identity and presentation before choosing the commodity code. Finished medicines in measured doses and bulk medicament mixtures have different headings. Do not use this active-ingredient code simply because a finished product contains estradiol.
| Goods | Commodity code | Duty | Anti-dumping or countervailing duty on China |
|---|---|---|---|
| Oestrogens and progestogens, including estradiol active ingredient | 2937 23 00 00 | 0% | None |
Specify the estradiol form and manufacturing site
State whether the order is estradiol itself or a named ester, and agree the hydration state, pharmacopoeial specification, assay basis, related substances, residual solvents and water content. Specify particle size or micronisation where needed for your formulation. Agree packaging, storage conditions and retest date.
For human-medicine use, UK businesses importing or distributing active substances must register with MHRA. Ask MHRA to confirm the applicable good manufacturing practice requirements. Ask MHRA to confirm the written-confirmation documentation or applicable exemption for the Chinese manufacturing site before shipment.
Identify the actual manufacturing site behind the trader. Request its manufacturing-quality evidence, a batch certificate of analysis and the documents your medicine manufacturer needs. Use factory verification to check the producer and the scope of the evidence supplied.
Worked duty example
Illustrative example, not a quote: 25 kg of estradiol active ingredient; illustrative order and values under 2937 23 00 00, invoiced at £40,000 free on board, with £800 of freight and insurance to the UK. The customs value is £40,800. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £40,800, so it is £8,160. 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 ordered chemical form and hydration state against the certificate of analysis and independent identity testing.
Batch quality: compare assay, related substances, residual solvents, water content and agreed particle size against the purchase specification.
Documents: match the manufacturing site and batch identifier across the analysis certificate, container labels and supply records.
Arrival: inspect seals, inner packaging, signs of moisture ingress and any agreed storage-condition records. Keep suspect material separate pending investigation; see quality inspection explained.
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What goes wrong
An order described only as estradiol can leave the chemical form, hydration state or assay basis unresolved. A satisfactory assay result does not settle an unacceptable impurity profile or particle-size mismatch. Write the acceptance criteria into the order and agree the sampling and test methods before shipment.
Documents may name a trader or a different production site, making the supplied manufacturing evidence difficult to connect to the batch. Resolve site identity and import documentation before dispatch. A supplier's description of the material as research grade does not demonstrate suitability for your medicine-manufacturing specification.
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 estradiol from China?
The supplied tariff record shows 0% duty under 2937 23 00 00, the oestrogens and progestogens line, with no anti-dumping or countervailing measure.
Do I need MHRA registration to import estradiol API?
For human-medicine use, a UK business importing or distributing active substances must register with MHRA. Confirm the activity and substance covered before ordering.
What should an estradiol specification include?
Specify chemical form, hydration state, pharmacopoeial specification, assay basis, impurities, residual solvents, water content, particle size, packaging, storage and retest date.
Can I use the same commodity code for estradiol tablets?
Finished medicines in measured doses fall under heading 3004. Confirm the presentation and classification rather than using the active-ingredient code for tablets.