Magnesium Persulfate Solution Crystals from United States
Magnesium persulfate (MgS2O8) is a crystalline compound used in analytical chemistry and as a bleaching agent. As a chemically defined peroxosulphate of an inorganic base, it is classified under tariff item 2833.40.00. Chapter 28 Note 3(a) excludes magnesium oxide, but this persulfate salt is not excluded and falls squarely within the heading.
Duty Rate — United States → Canada
0%
Import Tips
• Confirm the product is not magnesium oxide, which is excluded from Chapter 28
• Provide the chemical formula and purity certificate to the CBSA
• Check if the magnesium persulfate is in solution; if dissolved in water, it still qualifies under the heading