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%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
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