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* A preservative


O-Cymen-5-OL is an antifungal preservative used in cosmetics and beauty products to prevent harmful bacteria from developing and to prolong the shelf-life of formulas. It is part of the Isopropyl Cresols family and is originally developed synthetically in the form of a crystal. O-Cymen-5-OL is also used as a cosmetic biocide, or ingredient that helps to cleanse the skin or to prevent odor by destroying or inhibiting the growth of microorganisms, according to research.

Safety Measures/Side Effects:

O-Cymen-5-OL is approved by the FDA for use as a direct and indirect food additive and has been approved by the CIR for use in cosmetics up to .5% concentration. However, in the European Union, it is only approved for use up to .1%. Studies in Japan, some dating back to 1956, found O-Cymen-5-OL to be neurotoxic in animals and have led to heavier restrictions on its use in cosmetics there.

According to, "Data were available to demonstrate that m-Cresol and o-Cresol when tested at 0.5% do not cause chemical leukoderma (skin whitening). It may be that O-Cymen-5-OL do not cause chemical leukoderma at concentrations higher than 0.5%, but data were not available to support that possibility. Therefore, a concentration limitation of 0.5% was chosen to ensure the absence of a chemical leukoderma effect."

Recommended Products w/ O-Cymen-5-OL:

April Rain Night Renew

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