Ammonium Persulfate Crystals from Japan
Ammonium persulfate ((NH4)2S2O8) appears as colorless crystals widely employed as a radical initiator in emulsion polymerization and etching solutions. Classified in HTS 2833.40.60.50 as an 'other' peroxosulfate, it qualifies as a chemically defined ammonium peroxysalt per heading 2826-2842 note. Excluded from organic products per Chapter 28 structure.
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
• Provide chemical assay confirming >98% purity to distinguish from complex salts (2842); ammonium salts specifically noted for headings 2826-2842
• Declare as oxidizer Class 5.1 for proper hazmat shipping; ensure UN1490 proper shipping name on commercial invoice