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Type: Article
Section: Cosmetic Ingredients > Preservation
Literature/Data
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.
Preservation
Measuring Synergy
Because it is rare to find a single preservative that is broad spectrum enough to inhibit the different species of microbes, the synergistic use of multiple preservatives in cosmetics is useful.
Literature/Data
Patent Picks—Renewable Polyphenols, Eco-friendly Gellants, Nano Silver Particles and More
Chosen biweekly for their relevance to personal care, Patent Picks are taken from publicly available sources. This edition features patents related to eco-friendly materials and processes.
Literature/Data
Patent Picks—Pawpaw Anti-irritant, Degradation Sensor, Fenugreek Saponins and More
Chosen biweekly for their relevance to personal care, Patent Picks are taken from publicly available sources. This edition features patents related to preservation; ranging from the preservation of product stability, to antimicrobial technologies and a natural preparation to address preservative-induced irritation.
Skin Care
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.
Preservation
Ethyl Lauroyl Arginate HCl for Natural Preservation
Ethyl lauroyl arginate HCl (LAE), derived from natural lauric acid and L-arginine, is shown here to provide broad-spectrum activity against microorganisms including
Malassezia furfur
and
Propionibacterium acnes
. In vitro tests corroborated by in vivo evaluations suggest its efficacy in anti-dandruff and dermo-purifying applications.
Skin Care
Patent Picks—Natural Preservatives, Beta-Lactam for Hair Growth, Allyl Caproate for Sensory and More
Chosen biweekly for their relevance to personal care, Patent Picks are taken from publicly available sources. This edition features patents related to actives for skin and hair care as well as inventions to improve formulation stability, preservation and sensory attributes.
Method/Process
Preservative Efficacy Testing of Aqueous Cosmetics and Drugs without Counting Colonies
A miniaturized system using broth enrichment followed by either streaking on agar or fluorescence treatments can eliminate colony counting in the linear regression method of preservative efficacy testing.
Preservation
The Required D-Value: Evaluating Product Preservation in Relation to Packaging and Consumer Use/Abuse
Cosmetic and pharmaceutical products are subject to microbial contamination and spoilage during use. In 1970, Halleck published the recommendations of the Preservation Subcommittee of the Toiletry Goods Association Microbiology Committee, which stated that preservation studies should consider product formulation, manufacturing conditions, packaging, product stability and continued effectiveness of the preservative system during the intended use by consumers.
Literature/Data
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.
Preservation
Ingredient Profile—Benzoic Acid/Sodium Benzoate
Benzoic acid (BA) is a leading choice due to its long and successful history of use preserving foods, drugs and cosmetics. Affirmed as GRAS (Generally Recognized As Safe) by the US Food & Drug Administration (FDA), BA and its sodium salt, sodium benzoate (NaB), are perhaps the most globally acceptable preservatives that have managed to avoid the controversy associated with many of the industry’s tried-and-true preservatives.
Preservation
"Nature-identical" Preservative for More Sustainable Science
"Nature-identical" phenethyl alcohol was used to create schülke's sensiva® PA 20 (INCI: Phenethyl Alcohol (and) Ethylhexylglycerin). Phenethyl alcohol occurs widely in nature and has properties that help maintain the microbiological stability of personal care formulas.
Preservation
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.
Preservation
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.
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.
Preservation
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.
Preservation
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.
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?
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