Naphth[1,2-d]-[1,2,3]-Oxadiazole-5-Sulfonic Acid from Canada
Naphth[1,2-d]-[1,2,3]-oxadiazole-5-sulfonic acid is a fused heterocyclic compound explicitly listed in HTS 2934.99.03.00, featuring an oxadiazole ring fused to naphthalene with a sulfonic acid substituent. This aromatic heterocyclic compound serves as a dye intermediate and reagent in organic synthesis. Chapter 29 classification applies to its chemically defined heterocyclic structure.
Duty Rate — Canada → United States
110%
Rate breakdown
9903.04.60100%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
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
• Provide CAS number and NMR spectra confirming exact naphthoxadiazole structure to match specific HTS naming
• Include stability data as sulfonic acids are corrosive; DOT shipping papers required for hazardous classification
• Document <1% heavy metal impurities to avoid Chapter 28 inorganic salt classification