What a dye or textile chemical pays at the border, and why the invoice does not decide it.

A mill's chemical order rarely reads as one thing to customs, even when it is one line on the purchase order. A drum of reactive dye, a drum of pigment for a print run and a drum of a general finishing auxiliary can travel on the same bill of lading and land under three different headings, because the tariff classifies colouring matter by chemical class and by form — powder, liquid or prepared solution — not by what a mill calls it.

Dyes are one of this firm's stated specialities, and the account runs alongside the wider chemicals trade this firm has cleared for. What that trade actually needs and which regulator sits over it is covered on our chemicals and dyes industry page. This page is narrower: the PCT headings, the rates that attach to them, and the one valuation ruling we have found in force on a dye product this year.

It is rarely the customs duty rate that an importer disputes. It is which eight-digit code the dye belongs in, and that argument is won or lost on the certificate of analysis, not the commercial invoice. A reactive dye and a direct dye can look identical on a packing list and pay different duty, and the classification does not move just because a supplier's paperwork calls them the same thing.

Where a valuation ruling exists, as it now does for the intermediate above, the argument moves from classification to value — and a declared price under the ruling's floor is assessed at the floor regardless. Customs can revise a ruling, or issue a new one on a product that has none today, so we check what is in force before we advise a value rather than work from whatever we last had on file. Where a value is disputed rather than simply revised, that goes through the review process our valuation disputes guide sets out, not through argument at the terminal.