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
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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