Recent in Preservatives (page 4 of 6)

Boosting Preservative Efficacy With Propanediol

This article investigates the ability of Zemea (INCI: Propanediol) to boost preservative efficacy in an aqueous personal care formulation. This 100% bio-based propanediol is a colorless, pure glycol alternative derived from a sustainable, renewable corn fermentation process. The testing was conducted using standardized microbiology guidelines, known as preservative efficacy testing or challenge tests.

Formula Troubleshooting—Preservation

Cosmetics & Toiletries magazine is pleased to add this new “Formula Troubleshooting” column to the regular lineup. Led by column editor Peter Tsolis of The Estée Lauder Companies, it will cover some of the more common formulation challenges and suggest solutions for the benefit of novice formulators and as a refresher for seasoned experts.

Comparatively Speaking: Toxicity vs. Selective Toxicity

In the present "Comparatively Seaking" column, industry expert Anthony J. O'Lenick explains the difference between toxicity and selective toxicity in regard to preserving a personal care formula while also keeping the consumer safe.

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,”

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