preservative

Towelette Preservative Challenge Test For Cosmetics

Many cosmetics and personal care products are now available in the form of pre-saturated towelettes or wipes. Like the majority of personal care products having an aqueous base, pre-saturated towelettes are susceptible to microbial contamination and require a preservation system to protect them from degradation. Cosmetics and personal care...

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USP <51> – Preservative Challenge Test

Introduction The USP Chapter 51 Preservative Challenge Test is the most common method used to gauge preservative effectiveness.  Much like a Preservative Challenge Screen, it is used to evaluate the effect of preservatives in cosmetics, personal care products, and drug products. Preservatives are antimicrobial ingredients that are added to aqueous...

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ISO 11930 – Preservative Effectiveness Test

The ISO 11930 - Preservative Challenge Test is a procedure for evaluating the antimicrobial protection of a product. Much like the USP <51>, it evaluates the activity of preservatives or other intrinsic characteristics of a product that help maintain the safety of a product by inhibiting the growth and...

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PCPC (formerly CTFA) Test Methods for Cosmetics

Cosmetics and personal care products are perfect environments for microorganisms to grow unless proper measures are taken during formulation and manufacture to preserve them. Cosmetics and personal care products are intended for use in direct contact with the body and this makes it imperative for these products to be...

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Preservative Challenge Quick Test

Preservative Challenge "Quick Test": Procedure at a Glance Antimicrobial preservatives are substances added to non-sterile products to protect the product from microbiological growth that may be inadvertently introduced during the manufacturing process. In this study, the test demonstrates the effectiveness of the antimicrobial protection.  For the preservative challenge "quick test," the...

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Preservative Challenge Screen

Preservative challenge testing is a fast and easy way to learn about the efficacy of your preservative system. Preservatives are ingredients used to protect a product from deterioration and help it perform as intended for the lifetime of the product. The efficacy of a preservative depends on the combination of the product's...

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Preservative Challenge Test

USP 51: Procedure at a Glance The Antimicrobial Effectiveness test method or USP 51 utilizes the following microorganisms Candida albicans (ATCC No. 10231), Aspergillus niger (ATCC No. 16404), Escherichia coli (ATCC No. 8739), Pseudomonas aeruginosa (ATCC No. 9027), and Staphylococcus aureus (ATCC No. 6538). The test product is inoculated with...

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