Import duty / Chapter 29 / Heading 2931
Heading 2931 covers 17 tariff lines in LoadLoom's table; 16 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 |
|---|---|---|---|---|
| 2931.10 | Organo-inorganic compounds; tetramethyl lead and tetraethyl lead | 3.7% | Free | Free with certificate |
| 2931.20 | Organo-inorganic compounds; tributyltin compounds | 3.7% | Free | Free with certificate |
| 2931.41 | Non-halogenated organo-phosphorous derivatives; dimethyl methylphosphonate | 3.7% | Free | Free with certificate |
| 2931.42 | Non-halogenated organo-phosphorous derivatives; dimethyl propylphosphonate | 3.7% | Free | Free with certificate |
| 2931.43 | Non-halogenated organo-phosphorous derivatives; diethyl ethylphosphonate | 3.7% | Free | Free with certificate |
| 2931.44 | Non-halogenated organo-phosphorous derivatives; methylphosphonic acid | 3.7% | Free | Free with certificate |
| 2931.45 | Non-halogenated organo-phosphorous derivatives; salt of methylphosphonic acid and (aminominomethyl) urea (1:1) | 3.7% | Free | Free with certificate |
| 2931.46 | Non-halogenated organo-phosphorous derivatives; 2,4,6-tripropyl-1,3,5,2,4,6-trioxatriphosphinane 2,4,6-trioxide | 3.7% | Free | Free with certificate |
| 2931.47 | Non-halogenated organo-phosphorous derivatives; (5-ethyl-2-methyl-2-oxido-1,3,2-dioxaphosphinan-5-yl) methyl methyl methylphosphonate | 3.7% | Free | Free with certificate |
| 2931.48 | Non-halogenated organo-phosphorous derivatives; 3,9-dimethyl-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5] undecane 3,9-dioxide | 3.7% | Free | Free with certificate |
| 2931.49 | Non-halogenated organo-phosphorous derivatives; other non-halogenated organo-phosphorous derivatives, n.e.c. in item no. 2931.4 | 3.7% | Free | Free with certificate |
| 2931.51 | Halogenated organo-phosphorous derivatives; methylphosphonic dichloride | 3.7% | Free | Free with certificate |
| 2931.52 | Halogenated organo-phosphorous derivatives; propylphosphonic dichloride | 3.7% | Free | Free with certificate |
| 2931.53 | Halogenated organo-phosphorous derivatives; O-(3-chloropropyl) O-[4-nitro-3-(trifluoromethyl)phenyl] methylphosphonothionate | 3.7% | Free | Free with certificate |
| 2931.54 | Halogenated organo-phosphorous derivatives; trichlorfon (ISO) | 3.7% | Free | Free with certificate |
| 2931.59 | Halogenated organo-phosphorous derivatives; other halogenated organo-phosphorous derivatives, n.e.c. in item no. 2931.5 | 3.7% | Free | Free with certificate |
| 2931.90 | Organo-inorganic compounds; other than tetramethyl lead, tetraethyl lead, tributyltin compounds, and other organo-phosphorous derivatives | 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.
