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Type: Article

Section: Cosmetic Ingredients > Preservation

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?

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.

Comparatively Speaking: Antimicrobial vs. Preservative vs. Antibiotic

Industry expert Anthony J. O'Lenick Jr. investigates the difference between an antimicrobial agent, a preservative and an antibiotic.

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.

Comparatively Speaking: Gram-positive vs. Gram-negative Bacteria

Tony O’Lenick asks industry expert Kelly Dobos to explain the difference between Gram-negative and Gram-positive bacteria to understand the importance of selecting the proper preservative system for a cosmetic.

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Microbiological Considerations for Refillable Bulk Cosmetics: Survey and Commentary

The commercial sale of refillable products in bulk now includes liquid galenic formulas. Their diverse flow chains pose unique microbial challenges, as shown here, underlining the importance of flow chain planning and assessment tools/strategies.

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Is Your Microbiology Lab FDA-compliant? Part II: Cultures, Growth Media, Reagents and Testing

This two-part article provides an overview of areas relevant to the U.S. Food and Drug Administration’s (FDA’s) inspection of cosmetic microbiology laboratories. Part 1 covered personnel, facilities and equipment, test materials and procedures, and documentation. Part 2 addresses microbial cultures and growth media, biochemical reagents, test procedures and more.

Assessing the Safety of Parabens: Percutaneous Penetration and Risk Analysis

In cosmetics, parabens are widely used due to their low cost and efficacy. In recent years, however, some reports have claimed that these materials exhibit estrogenic activity, which has led to attempts to replace them in formulations. This article reviews penetration studies of parabens spanning the past 20 years to determine whether they pose a risk to human health.

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.

Assessing the Safety of Parabens: Percutaneous Penetration and Risk Analysis

In cosmetics, parabens are widely used due to their low cost and efficacy. In recent years, however, some reports have claimed that these materials exhibit estrogenic activity, which has led to attempts to replace them in formulations. This article reviews penetration studies of parabens spanning the past 20 years to determine whether they pose a risk to human health.

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Build the Basics, Optimize Products, Formulate Naturals and Penetrate Skin

In addition to courses for the beginning chemist, natural products and optimization of formulas, Cosmetics & Toiletries has added Physiology of the Skin, featuring Zoe Diana Draelos, MD, to its online training program. Buy at Suppliers' Day and save! Visit booth 1345.

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.

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