Predictive microbiology for cosmetics based on physicals, chemicals and concentration parameters

Abstract

Following the analysis of the different concentration, a correlation between glycerine and ethanol that directly influence microbiological protection of cosmetics products has been established. Indeed, by controlling ethanol, pH and glycerine, many products may be exempted from the CT.

Preservative efficacy of selected antimicrobials of natural origin in a cosmetic emulsion

“…. Based on very few previous studies, it is encouraging to find growing interest in research of the concentration‐dependent effects of preservatives in cosmetic products .…”

“…approximately 80%) and was thus very susceptible to microbial contamination, it is reasonable to question the so-called over-preservation of cosmetic products on the market, which was posited in a review by Lundov et al [27]. Based on very few previous studies, it is encouraging to find growing interest in research of the concentration-dependent effects of preservatives in cosmetic products [28][29][30][31].…”

Validation of analytical method for the quantitative determination of preservative acids allowed in Eco label cosmetic products

“…The preservation of biological or natural cosmetic products requires the development of new approaches to tend to low-risk microbiological products. 9,10 The researches on packaging in order to limit the risk of contamination (one-use, airless ...) is a delicate way since it must remain compatible with the ecological requirements (limitation of packaging). The self-protection concept is increasing, it needs the presence of substances which get bactericidalfungicidal properties without preservatives such as alcohols (ethyl, benzyl), aliphatic glycols (propylene glycol, glycerine), soaps, some fatty acids (monolaurin lipoaminoacids), antioxidants that work synergistically with traditional preservtives (BHT, EDTA...) and finally, the substances from plants or rich of substances with microbiological properties.…”

Stability of Cosmetic Formulations Containing UV Filters and Preservatives, Based on Physical and Chemical Parameters

“…However, this measure can be completed by challenge tests or total microbial count to specify microbiological modifications. [16][17][18][19] Viscosity can be specified by the nature of the flow with accurate measures using a software program. The analytical result provides information on concentration variation of actives compounds that is the objective of this work, but it can be completed by determination of degradation products and their toxicity.…”