Sourcing biotin from China

Biotin duty and classification

Read from the UK Trade Tariff on 18 October 2026, the other unmixed vitamins line, 2936 29 00 00, carried 0% duty for goods from China, with no listed anti-dumping or countervailing duty and no suspension. The table shows different purchasing specifications sharing this commodity line. Heading 2936 covers vitamins, their derivatives used primarily as vitamins and relevant intermixtures; see the wider vitamins guide.

The supplied tariff record attaches export controls for dangerous chemicals and waste to this line. The importer should confirm their relevance and any requirement with their customs broker, particularly before returning rejected stock to China.

Specify whether the shipment is unmixed biotin, a preparation containing a carrier, or finished supplements. Finished vitamin tablets and capsules are usually food preparations or medicines rather than heading 2936. Confirm the formulation and commodity code before ordering.

Specify biotin identity, assay and intended use

Write the chemical identity, intended use and grade into the purchase specification. Distinguish unmixed biotin from diluted powder containing a carrier. Agree the assay method, reporting basis, particle size, moisture specification and packing. Ask for the full composition rather than accepting a product name alone.

For food supplements, confirm the permitted vitamin form and finished supplement labelling requirements with the relevant food authority. For feed additives, confirm authorisation requirements with the relevant feed authority. For imported supplements, the importer is legally responsible for composition, safety and labelling. Request a certificate of analysis for the batch supplied, supporting stability data and evidence for the claimed grade.

Worked duty example

Illustrative example, not a quote: Illustrative small-business batch of unmixed biotin powder; FOB and freight values are illustrative under 2936 29 00 00, invoiced at £32,000 free on board, with £2,500 of freight and insurance to the UK. The customs value is £34,500. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £34,500, so it is £6,900. 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 and assay: check that laboratory results identify biotin and meet the agreed assay specification; match the tested sample to the shipment batch.

Composition: check whether the powder is unmixed or contains a carrier, and reconcile the full formulation with the order and certificate.

Contaminants: arrange batch testing for heavy metals, microbiology and residual solvents where relevant to the manufacturing process and intended use.

Packing and records: check seals, liners, moisture damage, batch labels and weights; match the retest or expiry information to supporting stability data.

What goes wrong

A certificate for pure biotin can be mistaken for evidence covering a diluted preparation. Comparing assay results reported on different bases can also hide a shortfall. Require the certificate and laboratory report to describe the actual powder shipped, including any carrier.

A passing supplier sample does not establish the quality of the delivered batch. Hold stock with mismatched batch records, damaged seals or unexplained assay results while investigating. Agree independent testing and the treatment of rejected material before paying the balance.

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.