There are two types of food grade H2O2 in Canada and most don't know the difference when asked. Sproutmaster sells it without stabilizers. Sproutmaster sells to health food stores like the Big Carrot. The food grade with stabilizers is made from 50% Super D Peroxide and contains stabilizers like phenol, acetanilide, sodium stanate, and tetrasodium phosphate. These grades should always be avoided. Be sure you know who the supplier is that the company/seller purchases from.
Virtually impossible to buy 35% food grade hydrogen peroxide in Canada. This is an exerpt from a letter from Terralink (a seller of HP):
As of March 1st 2009, the Explosives Regulatory Division (ERD) of Natural Resources Canada (NRCan) will not permit the sale of Ammonium Nitrate, Potassium Nitrate or Hydrogen Peroxide to any customer unless they provide a photo copy of government issued photo ID (Driver's Licence or Passport), Business Licence or Certificate of Incorporation to TerraLink.