Preservation of "Atypical" Cosmetic Product Systems

August 27, 2009 | Contact Author | By: John I. Yablonski and Sharon E. Mancuso, Bio-Control Service Group Inc.
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Keywords: preservatives | preservation | challenge testing | water activity | powders | hydroalcoholics | anhydrous gels

Abstract: The authors examine the facts that determine how to preserve and/or assess susceptibility/risk probabilities for cosmetic product systems that are "atypical" because they contain little or no water.

We can loosely define "atypical" cosmetic products as those product forms that do not naturally conform to the "typical" o/w formulation characteristics exhibited by the vast majority of cosmetic products currently on the market.

Over the years, there has been considerable controversy regarding both the general philosophy of needing to preserve atypical products and, if the need is considered to be valid, how to accomplish this without artificially disrupting the integrity of the product system under evaluation.