p-Toluidine Sulfate from Canada
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 — Canada → United States
16.5%
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
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