Phthalic Anhydride with 0.02% Inhibitor from Canada
Phthalic anhydride stabilized with minimal hydroquinone inhibitor (0.02%) to prevent premature polymerization during storage/transport, allowable under Chapter 29 note (f). Specifically classified HTS 2917.35.00.00 as the primary product remains the pure anhydride.
Duty Rate — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Specify inhibitor type/concentration in commercial invoice and SDS to validate note (f) stabilizer exception
• Maintain stabilizer levels via sealed packaging - degradation changes product identity
• Avoid excess stabilizer declarations which trigger 3824 chemical mixture classification