Ferric Ammonium Alum from Mexico
Ferric ammonium alum is a double sulfate of iron and ammonium, meeting the definition of an alum under heading 28.33. It is used as a coagulant in water treatment and as a mordant in dyeing. Its hydrated double salt structure is characteristic of alums.
Duty Rate — Mexico → Canada
0%
Import Tips
• Confirm the iron is in the ferric state (Fe3+) to ensure alum classification
• Provide documentation on the intended use, as water treatment applications may require additional health certifications
• Keep records of the chemical purity for CBSA verification