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Skin Safe FO Maximum - Manufacturer or IFRA?

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Hey all, I'm trying to make some roll on perfumes, and I was wondering what % you think I should go by? For example, almost all of NG's FOs say 5% maximum use, but when I check the IFRA certificates, the skin safe max will range between 5%-66% and some IFRA certs actually say "No Restriction". I've tried making some roll ons at 5% at NG's suggestion and you can hardly smell the FO after like 30 minutes. I was wondering what you thought the average, safe % was and why certain vendors have a % much lower than the IFRA limit?


TIA! :)

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