Sourcing L-valine from China

L-valine duty and classification

Read from the UK Trade Tariff on 1 October 2026, heading 2922 covers oxygen-function amino-compounds. The supplied facts contain no named L-valine line. The residual amino-acid code 2922 49 85 90 is the candidate to confirm for the pure substance. The table repeats this candidate for different purchasing uses, rather than presenting separate tariff lines.

The supplied line carries 0% duty for goods from China, with no listed anti-dumping or countervailing duty and no suspension. The tariff attaches veterinary control: ask your customs broker to confirm its application to the product's origin and manufacturing route. Where veterinary checks apply, consignments must enter through an approved border control post. An export waste control is also listed; ask the broker to confirm its relevance if returning discarded material.

Give the broker the composition, manufacturing route, intended use and batch documents to confirm the commodity code. Do not assume a formulated blend uses the same code as pure L-valine. See the L-threonine guide for related sourcing within the wider heading.

Specify L-valine identity and intended use

Write L-valine explicitly in the purchase specification. Agree identity testing, optical rotation or another suitable method for confirming the required form, assay basis, moisture, related amino acids, particle size and solubility testing. Require results for the batch being shipped, with the analytical methods stated, rather than a typical certificate.

Separate food, feed, laboratory and industrial orders. Food intended for human consumption must meet general food safety legal requirements. For feed use, ask your compliance adviser to check the relevant authorisation against the supplier's production strain and proposed use. For other uses, assess UK REACH registration and any exemption before ordering.

Agree sealed inner liners, outer packaging, batch identification and storage instructions. Have the receiving team agree the sampling and release procedure before dispatch, including which results require independent laboratory confirmation.

Worked duty example

Illustrative example, not a quote: Illustrative order: 20 tonnes of bagged L-valine under 2922 49 85 90, invoiced at £30,000 free on board, with £2,500 of freight and insurance to the UK. The customs value is £32,500. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £32,500, so it is £6,500. 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: check the product name and batch documents specify L-valine; confirm the analytical evidence distinguishes the required form from other forms or related amino acids.

Analysis: compare batch assay, moisture and impurity results with the agreed specification; check the assay basis and test methods match the contract.

Packaging: inspect liners, seals and outer bags for punctures, dampness, contamination and caking; photograph damaged packaging before moving the goods.

Traceability: match bag labels, batch identifiers, packing list and certificate of analysis; keep discrepant batches separate pending investigation.

What goes wrong

An assay result alone can leave optical identity unresolved. A certificate for a different batch, an unstated assay basis or a substituted grade can also make apparently acceptable paperwork unsuitable for the order. Resolve these differences before releasing material into production.

Damaged liners and damp bags can leave powder caked or contaminated. Record the condition on arrival and retain a representative sample. Use independent testing when identity or batch results need confirmation.

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.