Cobalt Ammonium Sulfate from Mexico
Double salt of cobalt and ammonium sulfate (CoSO4·(NH4)2SO4·6H2O) used in analytical labs and plating. Falls under HTS 2833.29.10.00 as a sulfate of cobalt, with complex salts directed by Chapter notes.
Duty Rate — Mexico → United States
1.4%
Rate breakdown
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
Import Tips
• Confirm if simple mixture or true double salt via X-ray diffraction for accurate heading 2833 classification
• Include molecular formula on commercial invoice to avoid disputes over complex salt status
• Segregate from organic-stabilized versions that may fall under excluded preparations