Methanesulfinic Acid Sodium Salt from China
Sodium methanesulfinate (CH₃S(O)ONa) is the sodium salt of methanesulfinic acid, classified under HTS 2930.90.4950 per Chapter 29 note 4(C)(1). Contains sulfur directly linked to carbon via sulfinic acid function; distinguished from sulfonic acids. Used as reducing agent in organic synthesis.
Duty Rate — China → United States
29.2%
Rate breakdown
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
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
• Submit counterion analysis confirming sodium content per salt classification rules
• Include oxidation state confirmation (S(IV) vs S(VI) sulfonic acids)
• Hygroscopic; specify moisture content <5% in COA