Potassium Salt of 2-Phosphonobutane-1,2,4-tricarboxylic acid from Canada
Dipotassium PBTC salt preferred in potassium-formulated cooling water treatments avoiding sodium discharge limits. Salts of specifically named acids remain in HTS 2931.90.70.00.
Duty Rate — Canada → United States
10%
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
• Potassium content analysis prevents misdeclaration as sodium salt affecting softener compatibility
• Lower alkalinity than sodium salt affects pH adjustment calculations for importers
• Certain states restrict potassium discharge; end-use letters may be required