Sodium Tripolyphosphate (STPP) from Japan
Sodium tripolyphosphate is a polyphosphate salt used primarily as a builder in detergents and cleaning products to soften water and enhance cleaning efficiency. It falls under HTS 2835.39.5000 as it is a polyphosphate compound, chemically defined, not specifically enumerated elsewhere in the heading.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Verify purity and chemical composition via lab analysis to confirm classification as a polyphosphate under Chapter 28
• Include Safety Data Sheets (SDS) and ensure compliance with EPA regulations for detergent precursors
• Avoid misclassification as a simple phosphate (2835.25) by documenting polymeric structure