Trioxane from Mexico
1,3,5-Trioxane is a six-membered heterocyclic ring with three oxygen hetero-atoms, classified under HTS 2932.99.70.00. Used as fuel tablets and formaldehyde source.
Duty Rate — Mexico → United States
110%
Rate breakdown
9903.04.6093.5%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Verify not in fuel tablet form (chapter note i exclusion to heading 3606)
• Formaldehyde content declaration required for safety
• Sublimation risk during transport; include temperature control documentation