Technical Sodium Sulfoxylate Dihydrate from Japan
Sodium sulfoxylate dihydrate (NaHSO2·2H2O) used in polymer synthesis and as a bleach in paper industry. HTS 2831.10.5000 covers this as 'other' sodium sulfoxylates, meeting inorganic compound purity notes. It decomposes to formaldehyde upon heating.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include water content analysis to confirm dihydrate status without shifting to mixtures
• Pair with end-use letters for industrial vs lab to prevent scrutiny