Import duty / Chapter 29 / Heading 2935
Heading 2935 covers 6 tariff lines in LoadLoom's table; 5 of them clear duty-free under USMCA for goods made in Canada, the US or Mexico. Published US and Canadian rates below, verified October 2026. Pick the line that matches your goods for the worked example and border steps.
| HS code | Goods | US duty | Canada duty | USMCA |
|---|---|---|---|---|
| 2935.10 | Sulphonamides; N-methylperfluorooctane sulphonamide | 6.5% | Free | Free with certificate |
| 2935.20 | Sulphonamides; N-ethylperfluorooctane sulphonamide | 6.5% | Free | Free with certificate |
| 2935.30 | Sulphonamides; N-ethyl-N-(2-hydroxyethyl) perfluorooctane sulphonamide | 6.5% | Free | Free with certificate |
| 2935.40 | Sulphonamides; N-(2-hydroxyethyl)-N-methylperfluorooctane sulphonamide | 6.5% | Free | Free with certificate |
| 2935.50 | Sulphonamides; other perfluorooctane sulphonamides | 6.5% | Free | Free with certificate |
| 2935.90 | Sulphonamides; n.e.c. in heading no. 2935 | 6.5% | Free | Not eligible |
This page is a free reference for shippers, not a customs ruling. Final classification and duty are determined by the licensed customs broker at entry, and government amounts are always billed at actual. Rates change with each tariff edition and trade action.
