Diphenyl Sulfone from Canada
Diphenyl sulfone (DPS) is a high-temperature solvent and polymer intermediate used in polysulfone production. HTS 2930.90.92.51 classification as other organo-sulfur sulfone. White crystalline solid with 250°C+ stability.
Duty Rate — Canada → United States
110%
Rate breakdown
9903.04.6096.3%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
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
• Melting point 124-126°C confirms engineering grade
• Low moisture (<0.1%) critical for polymerization applications
• Glass transition modifiers require additive disclosure