Persulfate Mixture for Polymerization from United States
A technical-grade blend of ammonium and sodium persulfates is used as an initiator in acrylic emulsion polymerization. Although it is a mixture, it is classified under tariff item 2833.40.00 as a peroxosulphate, provided the components are chemically defined and the mixture is not put up for retail sale. Chapter 28 Note 1 allows products with added stabilizers if necessary for preservation or transport.
Duty Rate — United States → Canada
0%
Import Tips
• Ensure the mixture is not put up in measured doses or for retail sale, which would shift classification to Chapter 38
• Provide the exact ratio of ammonium to sodium persulfate to the CBSA
• If the mixture contains other active ingredients, consider whether it is a preparation of Chapter 38