M Acid (1-Naphthylamine-5-sulfonic Acid) from Canada
M Acid provides amino-hydroxy-sulfonic functionality for naphthol AS dye series. Chemically defined per Chapter 29 (a), with oxygen-function amino characteristics. 2922.21.5000 classification for other such naphthalenesulfonic acids.
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 synthesis route confirming no halogenation (Chapter note exclusion)
• Specify dry powder vs solution form accurately
• CBP often challenges multi-functional compounds; have ruling ready