Import duty / Chapter 29 / Heading 2934
Heading 2934 covers 6 tariff lines in LoadLoom's table; 2 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 |
|---|---|---|---|---|
| 2934.10 | Heterocyclic compounds; containing an unfused thiazole ring (whether or not hydrogenated) in the structure | 6.5% | Free | Not eligible |
| 2934.20 | Heterocyclic compounds; containing in the structure, a benzothiazole ring-system (whether or not hydrogenated), not further fused | 6.5% | Free | Not eligible |
| 2934.30 | Heterocyclic compounds; containing in the structure, a phenothiazine ring-system (whether or not hydrogenated), not further fused | 6.5% | Free | Not eligible |
| 2934.91 | Heterocyclic compounds; other heterocyclic compounds, n.e.c. in 2934.1, 2934.2 and 2934.3 | Free | Free | Free with certificate |
| 2934.92 | Heterocyclic compounds; other fentanyls n.e.c. in 2934, and their derivatives | 6.5% | Free | Free with certificate |
| 2934.99 | Nucleic acids and their salts, other heterocyclic compounds, n.e.c. in heading number 2934 | Free | 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.
