WHAT IS CHALLENGE TEST? HOW TO INTERPRET THE CHALLENGE TEST REPORT?
Protective Efficacy Tests are important for the reliability of cosmetic preparations and their acceptance by the consumer.
The antimicrobial activity of the preservatives used for this purpose should continue throughout the use and shelf life of the product.
A test to determine the protective activity of any product or to search for various substances as protective is called a challenge test / screening test / protective activity test.
Challenge Test (Cosmetic Efficacy Test) in cosmetic products is included in our scope of accreditation with ISO 11930 method. You can contact us by completing the https://www.saniterlab.com/analysis-request-form to have the Challenge Test analysis accredited.
When is the Challenge Test Applied?
The Challenge / Efficacy activity assay is used to evaluate the protection of a cosmetic formulation against microbial action.
It is applied to all cosmetic products on the market.
What is not required?
Not required for cosmetic products with low microbiological risk
Microbiological low risk product groups according to ISO 29621 standard are listed below
| Physicochemical Factor | Limit |
| pH | ≤3,0 |
| pH | ≥10,0 |
| Ethanol or other alcohols | ≥%20 |
| Filling temperature | ≥65,0 °C |
| Water activity | ≤0,75 |
| Solvent based products | |
| Oxidizing products | |
| Aluminum chlorohydrate | ≥%25 |
What is the Limit Value for the Challenge Test?
The limits specified in the IS0 11930 standard for the Challenge Test are as in the table.
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