Magnesium Sulfite Tribasic from Canada
Tribasic magnesium sulfite (Mg3(SO3)2) used in pharmaceutical buffering and flame retardants. Classified in HTS 2832.20.00.00 as a chemically defined sulfite salt of an inorganic base.
Duty Rate — Canada → United States
13.1%
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
• GMP certification required for pharma grades; non-certified may face FDA detention
• Specify basicity level (tribasic); ambiguous descriptions lead to 2835 classification errors
• Monitor for asbestos contamination in natural-derived sources during inspections