Prothioconazole from Mexico
Prothioconazole features a triazolemethylthio ring system as a broad-spectrum triazole fungicide for cereals and soybeans. It falls under HTS 2934.99.18.00 as an 'other' aromatic heterocyclic pesticide, containing organo-sulfur directly linked to carbon per Chapter 29 note on heading 2930 exclusions. Imported as off-white technical solid.
Duty Rate — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Sulfur content verification prevents misclassification to organo-sulfur 2930
• Chiral purity (>95% S-isomer) specification required for efficacy claims
• Temperature-controlled shipping (<40°C) prevents triazole decomposition