Sodium Hexametaphosphate from Mexico
Sodium hexametaphosphate (SHMP) is a polyphosphate sequestering agent used in water treatment, ceramics, and food processing. It fits HTS 2835.29.51.00 as other polyphosphates, chemically defined under Chapter 28 exclusions. Glassy or powdered forms are typical.
Duty Rate — Mexico → United States
14.1%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Specify chain length in technical data to confirm polyphosphate status vs. simple phosphates
• Water treatment uses may require FIFRA registration; declare intended application
• Bulk imports should have anti-caking agents documented to prevent flow issues