Ferric Ammonium Sulfate from Mexico
Ferric ammonium sulfate ((NH4)Fe(SO4)2·12H2O) is used in analytical chemistry and as a mordant in dyeing. It qualifies under HTS 2833.29.20.00 as a sulfate of iron, treated as a metal salt per Chapter 28 notes on complex salts.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Declare as 'of iron' emphasizing the iron component to align with subheading
• Include REACH or TSCA registration if for lab/research import into US
• Prevent moisture absorption with desiccants to avoid hydrate state changes