2,5-Dichloroaniline-4-sulfonic acid from Canada
2,5-Dichloroaniline-4-sulfonic acid is a sulfonated aromatic amine explicitly covered by HTS 2921.42.36.00. Used in manufacturing acid dyes and as a pharmaceutical intermediate.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Confirm free acid vs salt form; only monosodium salt explicitly listed with parent acid
• Sulfuric acid derivatives require pH testing documentation for proper amine-function classification
• Avoid water solutions exceeding transport concentration limits per Chapter 29 note (e)