Potassium Stannate Trihydrate from Japan
Potassium stannate trihydrate (K2SnO3·3H2O) is a white crystalline powder used primarily as a source of stannate ions in chemical plating processes for metals. It falls under HTS 2841.90.30.00 as it is specifically the potassium salt of stannic acid, a peroxometallic acid derivative. This chemically defined inorganic compound is essential for electroless tin plating on substrates like circuit boards.
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 hydration state via Certificate of Analysis to match HTS description; ensure MSDS includes hazard classification for DOT compliance
• Common pitfall: mislabeling as general tin compounds leads to reclassification