Challenge Test in Cosmetic Products

Evaluation of Antimicrobial Protection in Cosmetic Products (Challenge Test / Stress Test)

Cosmetic products must remain microbiologically stable during the specified shelf life without opening the package. Preservatives are added to cosmetic products in order to ensure microbiological stability.

Challenge test is performed to evaluate the performance of preservatives used against microbial growth of a cosmetic product. Cosmetic products are subjected to an artificial contamination process in the laboratory environment.

The microorganism strains listed below are used within the scope of the challenge test.
• Pseudomonas aeruginosa (ATCC 9027)
• Staphylococcus aureus (ATCC 6538)
• Escherichia coli (ATCC 8739)
• Candida albicans (ATCC 10231)
• Aspergillus brasiliensis (ATCC 16404)
Within the scope of the test procedures, the antimicrobial protection of cosmetic products can be evaluated by counting microorganisms on the 7th, 14th and 28th days.

Our laboratories serving in many provinces in turkey, "Challenge Test" in accordance with legal regulations and standards relating to Türkak accreditation is carried out.