You are spot on schlger! Quinoxaline 7K is 2,3,6-trimethylquinoxaline...the active dye bleach catalyst. This is the molecule that I now synthesize (its effectively impossible to purchase this). Some items on this list are expressly required for the compounding format of the P3X concentrates, as well as the fact that the mixed solution will be used in roller transport mode with essentially open tanks.