Potassium Tripolyphosphate (KTPP) from China
Potassium tripolyphosphate is a potassium salt of tripolyphosphoric acid used primarily as a sequestrant and builder in detergents and water treatment. It falls under HTS 2835.39.10.00 as a polyphosphate of potassium, chemically defined per Chapter 28 notes. This inorganic compound helps prevent scale buildup in industrial boilers.
Duty Rate — China → United States
38.1%
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
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)
Import Tips
• Verify chemical purity and composition via lab analysis to confirm classification as a potassium polyphosphate under Chapter 28
• Include Safety Data Sheets (SDS) and Certificate of Analysis (COA) in documentation to avoid misclassification as organic compounds
• Check REACH-like regulations for phosphates; improper labeling can lead to customs holds