4,4'-Diaminostilbene-2,2'-disulfonic acid Powder from Canada
Powdered form of 4,4'-diamino-2,2'-stilbenedisulfonic acid, a white to light yellow crystalline compound used as a dye precursor. Classified specifically under HTS 2921.59.2000 as a separate chemically defined organic compound per Chapter 29 scope. The powder form with anti-caking agent is allowed under note (f).
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
• Ensure packaging prevents dust; declare anti-dusting agents per Chapter note (g) to avoid reclassification
• Provide REACH or TSCA compliance docs if destined for US/EU chemical processing