Hi highrisk
One thing I have learned about 35% H2O2 (Hydrogen-Peroxid) is that when it is produced and placed in a new container of any size it can be labeled food grade H2O2. When it is poured from the original container into a subsequent container (whether new or used) it must now be labeled technical grade H2O2 (Hydrogen-Peroxid) or similar.
hope this helps