Tetrasodium Pyrophosphate from Mexico
Tetrasodium pyrophosphate (TSPP, Na4P2O7) functions as a dispersant in ceramics and detergent builder. Though 'tetra', classified as disodium polyphosphate derivative under HTS 2835.22.00.00. Anhydrous powder for industrial applications.
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
• TSCA pre-notification for first import; declare as pure >94% to avoid 3824
• Detergent formulations containing >20% TSPP risk heading 3402 classification
• Solubility specs critical—insoluble impurities trigger quality holds