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Type: Article

Section: Cosmetic Ingredients > Preservation

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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.

1,2-Alkanediols for Cosmetic Preservation

Straight chain 1,2-alkanediols are multifunctional ingredients with moisturizing and antimicrobial activities. Here, the authors examine the ability of these materials to boost the activity of preservatives and to provide broad-spectrum antimicrobial activity. In addition, the authors describe how to combine these compounds into formulations to optimize stability and efficacy.

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Building Bridges Between Science and Nature

schülke’s sensiva line of multifunctional additives provides personal care products with a balance between efficacy and natural. The latest evolutions of this line, sensiva PA 30 and sensiva PA 40, are as gentle as natural ingredients and as effective as traditional preservatives.

Caprylyl Glycol/Phenethyl Alcohol Blend for Alternative Preservation of Cosmetics

In recent years, the safety of traditional preservatives has been called into question. Therefore, there is a need for alternatives that are effective, safe and sustainable—and that are non-controversial. In response, the present work investigates a mixture of caprylyl glycol and phenethyl alcohol, which is shown to provide antimicrobial activity in various skin and hair care formulations.

Natural Preservation from Concepts in Nature

Chemical defense mechanisms used in the plant kingdom are the basis of natural antimicrobials with multifunctionality for preservation of cosmetic formulations. Two examples are organic acids and glyceryl monoesters.

Caprylyl Glycol/Phenethyl Alcohol Blend for Alternative Preservation of Cosmetics

In recent years, the safety of traditional preservatives has been called into question. Therefore, there is a need for alternatives that are effective, safe and sustainable—and that are non-controversial. In response, the present work investigates a mixture of caprylyl glycol and phenethyl alcohol, which is shown to provide antimicrobial activity in various skin and hair care formulations.

Preserving Formulations Containing Alkyl Polyglucosides

The June 2008 issue of Cosmetics & Toiletries magazine featured an article from Cognis on the mildness of alkyl polyglucoside (APG) surfactants. The article stimulated the comments from readers and some of the questions are answered here.

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The Importance of Formaldehyde-Donor Preservatives in Personal Care Products

Preservatives are critical ingredients in personal care products and cosmetics, where they help to ensure consumer safety as well as product performance and stability. Among these materials, formaldehyde-donor (FD) preservatives have demonstrated a long history of safe and effective use for controlling microbial growth.

Heating Up the Preservative Debate

A possible solution to the preservative-free cosmetic formulation conundrum may lie in the milk pasteurization process. Ultra-high-temperature (UHT) sterilization is the process of heating milk or cream to temperatures exceeding 275°F.

Cracking Controversy

The concept of “sealed and preserved” is well-portrayed by the pull-top visual of Cosmetics & Toiletries' July 2013 cover, and it’s relevant to many industries—from food and beverages, to tennis balls. Preservation is also among the most popular search topics on the Cosmetics & Toiletries website, so we know it’s an important subject to many readers.

The Importance of Formaldehyde-Donor Preservatives in Personal Care Products

Preservatives are critical ingredients in personal care products and cosmetics, where they help to ensure consumer safety as well as product performance and stability. Among these materials, formaldehyde-donor (FD) preservatives have demonstrated a long history of safe and effective use for controlling microbial growth.

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.

Formulating More Natural Products: A Discussion

This article presents the viewpoint of a “granola” chemist who proposes that removing water from formulations also resolves other issues, such as the potential for contamination and excessive use of preservatives and emulsifiers. However, recognizing that several views presented here will certainly spark debate, some opposing reactions and counter-reactions are included as well, to promote discussion and constructive debate within the industry.

Bench & Beyond: Preservative Boosters—Up Against the Wall

This column has shown that many preservatives and preservative boosters have their killing and boosting effects at the cell wall. It seems likely that at least some of the preservative boosters will never become listed preservatives because they’ve bumped against a different kind of wall — a regulatory one.

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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.

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Do More with Less Using Multifunctional Additives

The use of multifunctional raw materials allows formulators to use less resources, an immediate cost saving. This can also economize warehouse space, saving time, energy and order processing, all while adding multiple benefits to finished cosmetic products.

Patent Picks—Selective Microbial Growth/Inhibition, Gentle Disinfectants, Improved Resistance and More

Chosen for their relevance to, or potential application in, cosmetics and personal care products, Patent Picks are taken from publicly available sources. This edition features new technologies for preservation and antimicrobial benefits.

Ingredient Profile—Sorbic Acid/Potassium Sorbate

SorbH and KSorb have become increasingly popular options for cosmetic preservatives due to their worldwide status as Generally Recognized As Safe (GRAS) food ingredients and their long and successful use history.

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