Tromethamine (Tris(hydroxymethyl)aminomethane) from Canada
Tromethamine, or Tris base, is an organic amino buffer used in biochemistry and pharmaceuticals. HTS 2922.50.50.00 classification applies to this amino alcohol with three hydroxymethyl groups. Essential for pH control in cell culture media.
Duty Rate — Canada → United States
110%
Rate breakdown
9903.04.6093.5%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
• GMP-grade requires additional FDA registration and quality control certificates
• Common in biotech; verify end-use declaration prevents pharmaceutical mixture misclassification
• Hygroscopic nature requires sealed packaging documentation