Ferric Ammonium Sulfate from United States
Ferric ammonium sulfate ((NH4)Fe(SO4)2·12H2O) is used in analytical chemistry and as a mordant in dyeing. It qualifies under tariff item 2833.29.00 as a sulfate of iron, treated as a metal salt per Chapter 28 notes.
Duty Rate — United States → Canada
0%
Import Tips
• Confirm the chemical composition and whether it is a double salt
• If it is a double salt, it may fall under heading 28.42; consult the CBSA
• Provide the chemical formula on the commercial invoice