Sourcing sulphurised fish oil from China

Duty depends on modification and blending

Read from the UK Trade Tariff on 1 October 2026, heading 1518 covers chemically modified oils, including sulphurised oils, and certain inedible fat preparations. Unblended sulphurised fish oil is a candidate for 1518 00 91 80. The table includes related blends and preparations as classification alternatives. Confirm the formulation through finding your commodity code. For the wider heading, see sulphurised vegetable oils.

For goods from China, 1518 00 91 80 carries 6%, with no recorded anti-dumping or countervailing duty and no suspension. The selected modified-oil biodiesel blends carry 7.70% plus a recorded residual anti-dumping rate of 54.64%. Other inedible animal-fat preparations under 1518 00 95 90 carry 2%. That line's suspension applies only to used cooking oil for biodiesel production, not sulphurised fish oil.

The tariff attaches veterinary, CITES, seal-product and waste import controls to the modified-oil lines. The animal-fat preparation line also carries an organic-products control. Establish the animal-origin route before ordering. For seal-product, organic-products and waste controls, the importer should confirm the applicable requirements or evidence of non-applicability for the Chinese consignment with their customs broker.

Specify sulphur activity and lubricant compatibility

Specify the fish species, source oil, sulphurisation process and intended industrial use. Agree total sulphur, active sulphur, viscosity at an agreed test temperature, acid value, moisture and insoluble matter. State the test methods alongside the acceptance criteria. Describe any carrier oil, solvent, vegetable oil or biodiesel in the formulation.

For lubricant use, agree a copper-corrosion test and a trial in the intended base oil. Check solubility, separation, odour and behaviour after storage. Approve a retained sample and require a batch analysis certificate. Specify drum material, closure, seal identification and storage instructions.

Ask APHA whether the product falls within its fat-derivative route for use outside the feed chain. That route permits imports from any country but requires an establishment approved to export to Great Britain. This does not establish approval for a particular Chinese factory or formulation. For medium- and high-risk animal-product imports, a health certificate is required. Agree the applicable route and documents before dispatch.

Identify the fish species and check CITES applicability; APHA requires permits for species listed in Annex A, B or C. Before sale in Great Britain, classify and label the chemical under the applicable chemical classification rules. Request a current safety data sheet and ask HSE to confirm the applicable UK REACH requirements.

Worked duty example

Illustrative example, not a quote: Illustrative order: 2 tonnes of unblended sulphurised fish oil in sealed drums under 1518 00 91 80, invoiced at £4,000 free on board, with £2,500 of freight and insurance to the UK. The customs value is £6,500. Duty at 6% is £390. Import VAT at 20% is charged on the customs value plus duty, £6,890, so it is £1,378. Import taxes total £1,768; a VAT-registered importer can usually reclaim the VAT, so the lasting cost is the £390 of duty. The import duty and VAT guide explains each step. This assumes the goods are standard-rated for VAT. Most food for human consumption is zero-rated, and animal feed can be too, in which case no import VAT is due, so check the rate for your product in HMRC's VAT Notice 701/14.

Inspection checklist

Identity: match the fish source, manufacturing process, formulation and batch references across the purchase specification, analysis certificate and shipment documents.

Performance: independently check total and active sulphur, viscosity, acid value, moisture and copper corrosion against the agreed methods and retained sample.

Arrival condition: inspect drum seals, leaks, corrosion and net contents; sample for water, sediment and separation before releasing the batch into production.

Documents: check the agreed animal-origin documents, species traceability, safety data sheet and labels. Use a written sampling brief for the quality inspection.

What goes wrong

A matching total sulphur result can conceal a different active sulphur profile. The oil may then stain copper-containing components or behave differently in a lubricant blend. Water, sediment and a changed carrier oil can also undermine the approved formulation. Test the supplied batch in the intended application before accepting a substitution.

Commercial descriptions such as technical fish oil can hide the distinction between unmodified oil, sulphurised oil and a prepared blend. Missing species records or an unresolved animal-origin route can leave the broker unable to establish the import requirements. Settle the formulation, classification and documents before shipment.

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.