3-Mercaptopropionic Acid from Canada
3-Mercaptopropionic acid serves as a cross-linking agent in polymer synthesis and corrosion inhibitor. It qualifies for HTS 2930.90.49 as an organo-sulfur carboxylic acid, meeting the direct sulfur-carbon linkage requirement of heading 2930.
Duty Rate — Canada → United States
14.2%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Include TSCA certification for US environmental compliance; failure common cause of entry refusal
• Label shipments with GHS hazard pictograms (corrosive, acute toxicity) per DOT/IATA regulations
• Document bulk vs packaged form—retail packs may shift to 3824.99