Refrigerated Liquid Buta-1,3-diene from Mexico
Liquefied buta-1,3-diene stored at -4°C under pressure, classified under HTS 2901.24.10.00 per Chapter 29 note (e) as solvent-free pure compound in transport form. Used primarily in tire manufacturing as synthetic rubber feedstock.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Temperature logs required throughout transit to prove product remained chemically unchanged
• Stainless steel IMO Type 5 tanks mandatory; carbon steel risks polymerization corrosion
• CBP may require inhibitor analysis (<50 ppm if present) to verify transport-only stabilization