Trioxane from Mexico
1,3,5-Trioxane is a cyclic trimer of formaldehyde used as fuel tablet component and chemical intermediate, qualifying as cyclic polymer of aldehyde per heading 2912 scope. Classified HTS 2912.49.90.00 as other aldehyde-oxygen compound. Chemically defined heterocyclic structure.
Duty Rate — Mexico → United States
14.8%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Melting point (62°C) and cyclic structure confirmation via DSC/NMR
• UN 1166 classification for flammable solid transport
• Purity certificate excluding polymer impurities >2%