Benzophenone 4 and CHG

Hi Guys!!! I was wondering, is Benzophenone-4 anionic or cationic? Im formulating a feminine wash with 1%CHG. a problem had occurred regarding the stability of the color (FD&C Blue 1) and I read here about adding stabilizers like BP4, but Im not sure if BP$ and CHG are compatible with each other (*CHG is cationic.) Thank You :))
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