Technical Grade Potassium Stannate from China
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 — China → United States
38.1%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
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