Hypophosphorous Acid 50% Solution from Canada
Hypophosphorous acid (H3PO2) 50% aqueous solution serves as a reducing agent in chemical synthesis and electroless plating. It is classified in HTS 2811.19.61.90 as an other inorganic phosphorus oxyacid. Excluded from Chapter 28 note 2 only for specific carbon compounds, qualifying as chemically defined.
Duty Rate — Canada → United States
14.2%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include phosphorous content lab test results to avoid confusion with phosphorous acid (H3PO3) in same subheading
• UN 2835 hazardous; require spill containment plans in shipping manifests
• Avoid pitfall of classifying as 'phosphite' salts, which go to 2835; confirm free acid form