2929.10.27.00/N-Butyl Isocyanate 98% Stabilized/Mexico

N-Butyl Isocyanate 98% Stabilized from Mexico

N-Butyl isocyanate stabilized with 0.05% dibutyltin dilaurate (CAS 111-36-4) prevents polymerization during storage and transport. Remains classified under HTS 2929.10.2700 per Chapter 29 note (f) as the isocyanate retains its chemical identity with necessary stabilizer addition.

Duty Rate — Mexico → United States

10%

Rate breakdown

9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico

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Import Tips

• 1

• Declare stabilizer composition and percentage on commercial invoice; 2

• Stabilizer must be <1% to maintain principal compound status; 3

• Include accelerated stability test data