Potassium Hydroquinone Disulfonate from Mexico
Potassium hydroquinone disulfonate, an inorganic salt of hydroquinone per Chapter 29 Note 5(C), is classified under HTS 2907.22.5000 'other.' Used in photographic processing as a stable developer component resistant to aerial oxidation.
Duty Rate — Mexico → United States
15.5%
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
Import Tips
• Classify as hydroquinone salt per Chapter Note 5(C)(1); provide salt formation chemistry and counterion analysis
• Declare water solubility and photographic end-use to distinguish from general chemical hydroquinone
• Include batch assay confirming sulfonate substitution pattern matching hydroquinone parent structure