Congo Red Direct Dye from Canada
Congo Red (Direct Red 28) is the classic diazo direct dye used for cotton dyeing and as a pH indicator in labs. It qualifies under HTS 3204.14.50.00 as synthetic organic direct coloring matter per chapter note 3. Famous for its red-to-blue color change in acidic conditions.
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
• Include historical C.I. number (22120) and application method in commercial invoice
• Note potential carcinogen classification requiring special handling documentation
• Prevent reclassification as pigment preparation (3206) by proving water-soluble dye form