Triphenyl Phosphite from Canada
Triphenyl phosphite serves as a stabilizer and antioxidant in polymer processing. Technically a phosphite ester (P(OR)3) but classified under HTS 2920.90.2000 as aromatic ester of phosphorous acid per HTS structure. Chemically defined with CAS 101-02-0.
Duty Rate — Canada → United States
16.5%
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
Import Tips
• Distinguish from triphenyl phosphate; phosphite stabilizers oxidize to phosphates during use
• Provide polymer processing end-use documentation to support classification