Naphth[1,2-d]-[1,2,3]-Oxadiazole-5-Sulfonic Acid Sodium Salt from Germany
The sodium salt of Naphth[1,2-d]-[1,2,3]-oxadiazole-5-sulfonic acid, explicitly covered in HTS 2934.99.03.00, maintains the aromatic heterocyclic classification of Chapter 29. This water-soluble form is preferred for dye manufacturing processes. Salts of organic compounds remain classified with the parent acid per Chapter 29 note 3(C)(1).
Duty Rate — Germany → United States
25%
Rate breakdown
9903.04.6215%Patented pharmaceutical articles that are the product of Japan, of a European Union member country, of South Korea, of Switzerland, or of Liechtenstein as provided for in subdivisions (c) and (f) of U.S. note 40 to this subchapter
9903.05.3910%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.97, articles the product of a member state of the European Union, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 10 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Counterion analysis (Na+ content) required to confirm salt formation doesn't alter organic compound classification
• pH stability data essential as sodium sulfonates affect shipping and storage requirements
• Avoid retail packaging that triggers Chapter 32 dye classification exclusion