7-Nitronaphth[1,2]oxadiazole-5-sulfonic acid monohydrate from Canada
Hydrated crystalline form of the acid compound, still classified under HTS 2934.99.06.00 per Chapter Note 2(d) allowing water dissolution. The monohydrate form enhances handling stability for lab and industrial synthesis applications.
Duty Rate — Canada → 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
9903.05.2910%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
• Specify exact water content (theoretical 8.5% for monohydrate) in COA
• Use desiccated packaging to maintain hydration state during transit
• Avoid classification disputes by confirming water is lattice-bound, not solvent