Safely formulating with Zinc pyrithione

Please weigh in on this. I am looking to create an antibacterial face wash with .10% ZP. However, I'm finding a lot of research about it's toxicity. I found a research that stated even though the salt of ZP is highly soluble in water, it is not suitable for cosmetic use or skin contact. Can someone explain that mechanism...as to why that solution toxic? The ZP doesn't necessarily have to dissolve in my formulation since it is a wash off product, but now I'm scared that I will harm myself even when rinsing the face wash.

Please help.
Thank in advance!
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