Technical Grade Potassium Stannate from Mexico
Technical grade potassium stannate is a commercial powder (typically 40-60% K2SnO3) for immersion tin plating in electronics manufacturing. It qualifies for HTS 2841.90.30.00 as the designated potassium salt of stannic acid, despite minor impurities allowed in technical grades. Used to create uniform tin layers on copper for solderability.
Duty Rate — Mexico → United States
13.1%
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 minimum stannate content (e.g
• 40%) in commercial invoice; test for heavy metals per REACH/TSCA
• Avoid: classifying as 'mixtures' without predominance proof