Recent in Preservatives (page 4 of 6)

Effective vs. Ineffective Preservation Using Water Activity*

Important to understanding preservation in cosmetics and personal care is the discussion of water activity, as was discussed last week in Tony O'Lenick's "Comparatively Speaking" column. The present column takes this concept a step further with expert David Steinberg's explanation of how to use water activity for effective preservation.

Comparatively Speaking: Water Content vs. Water Activity

In this edition of "Comparatively Speaking," Tony O'Lenick explains the different between water content and water activity, since understanding water activity can lead the formulator to more effective product preservation and better product stability.

2010 Frequency of Preservative Use

This article reports the frequency with which preservatives are used in personal care in both the United States and Canada. Surprisingly, the use of parabens continues to grow while imidazolidinyl urea, quaternium-15 and triclosan are on the decline. The fact that the FDA’s voluntary registration program is poorly supported plays into the hands of NGOs.

Natural Preservative Blends with Antioxidant Action

Sabinsa has introduced two natural preservatives that also serve as antioxidants and prevent the oxidation of oils and fats in personal care formulations.

Influence of pH on the Preservative Boosting Effect of Chelating Agents

A system based on phenoxyethanol and ethylhexylglycerin (euxyl® PE 9010) from Schülke & Mayr is described here to boost the efficacy of preservatives. To substantiate its efficacy, the effects of the system were checked at pH levels of both 7.0 and 5.0.

Preserving Naturally Without Affecting Color and Odor

Univar and the Professional Compounding Centers of America (PCCA) introduced a natural preservative solution that protects personal care products against Gram-positive and Gram-negative bacteria without altering the formulation's odor or color.

Oil, Water-soluble Phenoxyethanol for Broad Spectrum Preservation

Dow Microbial Control, a business group of The Dow Chemical Company, has developed an oil and water-soluble phenoxyethanol that provides preservation across a broad range of bacteria, fungi and yeast.

Comparatively Speaking: Cosmetic Preservatives

To serve the novice cosmetic chemist and/or refresh the seasoned formulator, Tony O’Lenick asks Perry Romanowski: Why is cosmetic preservation necessary, and why are preservatives vilified?


Efforts toward preservation are more than a trend, they are an essential component of the inner workings of our industry. Consider how much of the world has recognized this and joined in adopting sustainable and eco-friendly practices and it becomes obvious. In the words of writer Samuel Butler, “Self-preservation is the first law of nature,”

Optimizing Formula Preservation

To ensure that a consumer-ready product is safe, an appropriate preservation strategy must be established for the development, manufacture and packaging of the formula, thus eliminating unacceptable levels of organisms such as pathogenic bacteria, fungi and mold that could grow and pose a health hazard to the consumer.

Parabens: Myth and Reality

This review offers an in-depth look at one of the most controversial scientific studies of recent years and explores the relevance of the results of this study and other selected studies to the current layman’s perception of the safety of parabens.

SCANCOS Defends Paraben Safety, Addresses Nanoparticles

The Scandinavian Society of Cosmetic Chemists (SCANCOS) defended the safety of parabens and addressed the safety of nanoparticles at its Sustainable Cosmetics Conference, held Nov. 5-6, 2009 in Malmö, Sweden.