N-Butyl Isocyanate from Mexico
N-Butyl isocyanate (CAS 111-36-4) is a chemically defined aliphatic isocyanate compound with the formula CH3(CH2)3NCO, used primarily as a reactive intermediate in organic synthesis for polyurethane production and pharmaceutical intermediates. It falls under HTS 2929.10.2700 as a specific isocyanate with 'other nitrogen function' per Chapter 29 note (a), distinct from excluded products like ethyl alcohol or enzymes.
Duty Rate — Mexico → United States
10%
Rate breakdown
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
• 1
• Provide Safety Data Sheets (SDS) and CAS number (111-36-4) for customs verification; 2
• Ensure UN-approved packaging for Hazard Class 6.1 toxic liquids; 3
• Avoid misclassification as polyurethane prepolymers which fall under Chapter 39