Potassium Hydroquinone Disulfonate from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 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