p-Sulfobenzoic Acid Potassium Salt from China
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 — China → United States
35%
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
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
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