Utilization of electrochemical silver ions as preservative agent in cosmetic dispersions.
The use of anodic silver ions as preserving agents in cosmetics was tested by a challenge test in a set of cosmetic dispersions with the addition of known preservative inhibitors or micro-organism growth-promoters such as humectants, hydrosoluble collagen and vegetable extracts. Silver's microbicidal efficacy, compared to that of imidazolidinyl urea or methyl p-hydroxybenzoate, showed a more efficient activity especially in the presence of proteinaceous material. This agent may represent a good and safe protection for finished products both in manufacture and during use.
Dipartimento di Studi di Chimica e Tecnologia delle Sostanze Biologicamente Attive, Facolta` di Farmacia, Universita` `La Sapienza', P. Le Aldo Moro 5 00185 Roma Italy.
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M
Scalzo
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Cerretou
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C
Orlandi
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Simonetti