N-Butyl Isocyanate from China
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 — China → United States
35%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
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