Ammonium Alum Powder from Mexico
Ammonium alum powder, chemically ammonium aluminum sulfate dodecahydrate, is a double sulfate salt classified as an alum under heading 28.33. It is used in flameproofing textiles and as a component in baking powder. Its composition as a hydrated double sulfate of ammonium and aluminum places it squarely within the tariff item for alums.
Duty Rate — Mexico → Canada
0%
Import Tips
• Ensure the product is clearly labeled with its chemical name and purity to support classification as an alum
• If imported for food use, verify it meets Health Canada food additive requirements
• Keep certificates of analysis handy for CBSA inspection