Industrial Sodium Tripolyphosphate for Ceramics from Mexico
STPP used in ceramics manufacturing as a deflocculant to disperse clay slips and control viscosity. As pure sodium triphosphate, it is classified in HTS 2835.31.00.00 under polyphosphates. Excluded from other chapters as a chemically defined inorganic compound.
Duty Rate — Mexico → United States
11.4%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Include end-use statement for ceramics to facilitate bonding warehouse entry if needed
• Ensure pH and sequestration specs in SDS for industrial validation