I don't know how true it is, but I have heard that the only difference between technical grade 35% H2O2 (Hydrogen-Peroxid) and food grade 35% H2O2 (Hydrogen-Peroxid) is that with food grade, each and every bottle has to be tested for purity, whereas with technical grade, only the larger barrel needs to be tested for putiry. In essence they are the same in origin.