p-Sulfobenzoic Acid Potassium Salt from Japan
p-Sulfobenzoic acid potassium salt is an aromatic sulfonic acid derivative used as an intermediate in dye manufacturing and pharmaceutical synthesis. It qualifies for HTS 2916.39.04.00 as it is explicitly named in the tariff description for aromatic monocarboxylic acid sulfonated derivatives.
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
• Verify potassium salt form via spectroscopy; acid form would classify under 2916.39.1700
• Include assay certificate confirming >98% purity to meet chemically defined compound requirements
• Watch for moisture absorption during shipping which can affect declared weight and purity