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%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
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