Sulfanilic Acid with 0.5% Stabilizer from Canada
Sulfanilic acid stabilized with 0.5% anticaking agent for safe transport and storage qualifies under HTS 2921.42.22.00 per Chapter 29 note (f), retaining classification as the base chemically defined compound. The stabilizer is necessary for preservation without altering general use.
Duty Rate — Canada → United States
16.5%
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
• Document stabilizer composition and quantity (<1%) to justify Chapter 29 note (f) classification
• Test for caking prevention efficacy if challenged by customs on 'necessary' addition