Anhydrous Sodium Thiosulfate Powder from Mexico
Anhydrous sodium thiosulfate (Na2S2O3) is a white powder form of the compound used in gold extraction and as a dechlorinator in water treatment. Classified under HTS 2832.30.10.00 as the pure sodium thiosulfate salt, distinct from its hydrated forms but sharing the thiosulfate heading.
Duty Rate — Mexico → United States
11.5%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Provide lab assay confirming anhydrous state (>99% purity) to distinguish from pentahydrate and secure 2832.30.10.00 rate
• Comply with TSCA import certification if for commercial use; check for antidumping duties from certain origins
• Avoid bulk packaging over 25kg without inner liners to prevent moisture absorption, which could reclassify as hydrated form