Tributyl Phosphate (TBP) from Canada
Tributyl phosphate is an alkyl phosphate ester extracted for nuclear fuel processing, solvent extraction, and as a plasticizer. It qualifies for HTS 2919.90.50 as an 'other' phosphoric ester without specified modifications. The trialkyl structure fits the phosphoric esters heading per Chapter 29 scope.
Duty Rate — Canada → United States
13.7%
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
• Nuclear-grade imports require additional NRC documentation; declare CAS 126-73-8 and >95% purity
• Hazardous material declaration mandatory (UN 3098); common error is classifying as antifoaming agent under 3402
• Verify no inorganic salts present, as per note 5(C)(1) salts follow organic compound heading