Saxitoxin in Aqueous Solution from Mexico
Saxitoxin dissolved in water for stability during transport falls under HTS 2939.80.0010 per Chapter 29 note 2(d). The aqueous solution qualifies as a normal transport method without rendering it for specific use.
Duty Rate — Mexico → United States
110%
Rate breakdown
9903.04.6093.5%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
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
• Declare solution concentration and stability data to justify aqueous form
• Refrigerated shipping required; include temperature monitoring records
• Confirm solvent doesn't create specific-use formulation per chapter note 2(e)