p-Toluidine Sulfate from China
p-Toluidine sulfate is the sulfuric acid salt of p-toluidine used in diazo salt production for azo dyes. Chapter Note (C)(1) mandates classification with parent toluidine under HTS 2921.43.90. The sulfate enhances water solubility for dye coupling processes.
Duty Rate — China → United States
44%
Rate breakdown
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)
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Quantify sulfate counterion; bisulfate forms may classify differently
• pH stability data prevents acidic mixture misclassification
• Diazo coupling test confirms reactivity consistent with Chapter 29 chemical