Sourcing L-arginine from China

L-arginine duty and classification

Read from the UK Trade Tariff on 1 October 2026, heading 2922 covers oxygen-function amino-compounds. The supplied residual amino-acid line, 2922 49 85 90, carries 0% duty for Chinese-origin goods, with no listed anti-dumping or countervailing duty and no suspension. The table repeats this provisional line for different L-arginine supply forms and uses; these are not separate tariff lines.

The UK Trade Tariff attaches veterinary control to this line, referring to an entry document for animal-origin products. For animal-derived material from China, official guidance says the raw animal material must be listed in the relevant permitted annex. Confirm eligibility and the applicable documents with your customs broker before ordering. The facts also attach an export waste control; ask the broker to confirm its relevance if a shipment involves waste.

Give your broker the chemical identity, free-base or salt form, composition, production origin and intended use to confirm the commodity code. Have capsules and formulated blends assessed separately. For the wider heading, see L-lysine hydrochloride.

Specify the L-arginine form and use

State whether you require L-arginine free base or hydrochloride, and whether it is for food manufacture, laboratory work or another process. Agree identity and optical-rotation checks, assay basis, moisture, related substances, particle size and dissolution behaviour. For hydrochloride, specify whether the reported assay measures the salt or its arginine content.

Ask for the manufacturing route and a declaration covering animal-derived raw materials and processing inputs. Food-use material must meet general food safety requirements. If you sell L-arginine as a food supplement, register as a food business operator with your local authority. Food claims must not state or imply that the product treats, prevents or cures disease.

Confirm with HSE whether imports of the substance into Great Britain need UK REACH registration or qualify for an exemption. Check the intended use and any exemption before ordering; a supplier's grade description does not settle that question.

Worked duty example

Illustrative example, not a quote: One tonne of L-arginine free-base powder in lined bags, illustrative only under 2922 49 85 90, invoiced at £2,500 free on board, with £980 of freight and insurance to the UK. The customs value is £3,480. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £3,480, so it is £696. 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 free base or hydrochloride and the specified stereochemical identity to the batch test results.

Analysis: check assay basis, moisture and related substances against the agreed specification; for food use, include agreed metals and microbiological tests.

Packing: inspect liners, seals and bags for tears, dampness, caking and foreign matter before accepting stock.

Batch records: match bag labels, the certificate of analysis and delivery documents; retain a representative sample for testing and certification.

What goes wrong

A free-base order supplied as hydrochloride changes the formulation. An assay reported on a dry basis can hide a moisture difference, while a typical analysis sheet may describe material other than the shipped batch. Compare the actual batch results and test an arrival sample against the written specification.

Damp or damaged liners can leave powder caked or contaminated. An unsupported animal-origin declaration leaves the import-control question unresolved. Hold affected stock apart while you investigate, and settle the corrective action with the supplier before using or repacking it.

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.