Preservative Challenge Testing

Preservative challenge testing of cosmetics and personal care products is important to ensure the safety of the products prior to consumer use. According to the FDA, it is the responsibility of the finished product manufacturer to substantiate the safety of both ingredients and finished cosmetic products prior to marketing. The ability of a preservative system to protect the product from microbial growth and degradation must be established through microbial challenge testing of the complete formulation.

Challenge testing cosmetics is likely the single most important type of testing a cosmetic maker can do to protect their product. This testing allows manufacturers and formulators of cosmetics to have a clearer picture of how their products will withstand microbial attack which is inevitable during consumer use. Testing cosmetics and personal care products to ensure stability is necessary and cosmetic challenge tests are an essential part of any product's stability testing regimen.

Microchem Laboratory specializes in both industry standard challenge test methods and custom methods based on those standards to assist you in your preservative challenge testing needs. We offer the following test methods:


Our staff of knowledgable scientists are ready to help determine the best and most cost effective challenge testing for your needs.