Sourcing lab pH buffers from China
Laboratory pH buffer solutions from China within heading 3822 carry 0% UK duty across the relevant lines. Before selling in Great Britain, ensure correct chemical labelling and packaging; specify the certified value, measurement temperature and batch evidence. Cambridge China Bridge sources laboratory pH buffer solutions.
Zero duty, with composition checks
Read from the UK Trade Tariff on 20 October 2026, heading 3822 covers prepared diagnostic or laboratory reagents and certified reference materials. For buffer solutions, the relevant candidate lines are other prepared laboratory reagents and other goods, including certified reference materials. The supplied facts contain only these relevant lines, so the table excludes disease-specific reagents.
Both candidate lines carry 0% duty for goods from China, with no listed anti-dumping or countervailing duty and no suspension. For 3822 90 00 00, the tariff attaches Veterinary control and a restriction concerning ozone-depleting substances. Ask for the complete formulation, including ingredient origin. The importer should confirm the veterinary requirement with their customs broker. Importing ozone-depleting substances into Great Britain requires a licence.
Confirm the commodity code using the formulation, intended use and reference-material documentation. Repeated buffer values do not create separate tariff lines. See the wider diagnostic and laboratory reagents guide and the import duty and VAT guide.
| Goods | Commodity code | Duty | Anti-dumping or countervailing duty on China |
|---|---|---|---|
| Prepared laboratory buffer solutions, subject to classification | 3822 19 00 90 | 0% | None |
| Certified reference buffer solutions, subject to classification | 3822 90 00 00 | 0% | None |
Specify the buffer value and its temperature
Specify the nominal pH, acceptance tolerance, reference temperature and temperature correction table. Request the formulation, colourant and preservative details, bottle material, closure, fill volume, storage conditions, unopened shelf life and instructions after opening.
For a certified reference material, request the certificate matching the batch, assigned value, measurement uncertainty and traceability statement. Agree how arrival samples will be measured, including meter calibration, electrode condition and sample temperature.
Before sale in Great Britain, ensure the chemicals are correctly labelled and packaged. A hazardous chemical supplied for workplace use requires a safety data sheet. Obtain the formulation and chemical safety information before approving the printed bottle label.
Worked duty example
Illustrative example, not a quote: Illustrative order: 500 bottles of prepared laboratory buffer solution under 3822 19 00 90, invoiced at £5,000 free on board, with £300 of freight and insurance to the UK. The customs value is £5,300. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £5,300, so it is £1,060. 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
Batch documents: match bottle and carton batch identifiers to the certificate of analysis and any reference-material certificate.
Measurement: test retained samples against the agreed pH tolerance at the stated temperature, using the agreed method.
Containers: check seals, leakage, fill quantity, sediment and unexpected colour changes against the approved sample.
Labels and storage: check product identity, batch, expiry and storage wording against the agreed artwork and shipping records. Arrange quality inspection before dispatch.
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What goes wrong
A nominal pH printed on a bottle is insufficient evidence of batch accuracy. Measurements become difficult to compare when the certificate omits temperature or the buyer uses a different measurement method. Opened bottles can also become contaminated through repeated use.
Generic certificates, mismatched batch identifiers and leaking closures undermine acceptance. Agree the batch documents, sampling method and rejection criteria before ordering, and keep arrival samples separate from bottles already used for calibration.
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 laboratory pH buffers from China?
The relevant candidate lines within heading 3822 carry 0% duty in the supplied tariff reading, with no listed anti-dumping or countervailing duty. Confirm the code for the actual formulation.
Which documents should accompany pH buffer solutions?
Request a batch certificate of analysis, temperature correction data and storage instructions. For certified reference material, also request its batch certificate, uncertainty and traceability statement.
Do laboratory buffers need a safety data sheet?
A hazardous chemical supplied for workplace use requires a safety data sheet. Obtain the formulation and chemical safety information so the actual buffer can be assessed.
How should I check a buffer shipment on arrival?
Match batch documents and labels, inspect seals and leakage, and measure samples at the certificate's stated temperature using the agreed method and acceptance tolerance.