Naphth[1,2-d]-[1,2,3]-Oxadiazole-5-Sulfonic Acid Sodium Salt from China
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 — China → United States
0%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 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