Potassium Salt of 2-Phosphonobutane-1,2,4-tricarboxylic acid from China
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 — China → United States
37.5%
Rate breakdown
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
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