N-Butyl Isocyanate from Japan

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 — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter

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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