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Challenge test

Always on the safe side

1T2TS -1T201

Title

Challenge test for 5 germs + Validation (to avoid false negative)

Objective

Assessment of antimicrobial preservation efficacy

Schedule

Duration of the study: 28 days + report: 6 weeks. You will be informed of the results for each intermediate incubation time (D7, D14) by email

Quantity

Optimal: 100 g

Minimal: 10 g per germ

Standard

ISO 11930

Or USP 51

Or European Pharmacopeia

Procedure

After inoculation of the formula with calibrated inoculum, the number of surviving microorganisms is measured at specific time ranges during 28 days. For each time and each germ, the rate of logarithmic reduction is calculated and compared to minimum required values for evaluation criteria (A or B).

Used strains: Pseudomonas Aeruginosa, Staphylococcus Aureus, Escherichia Coli, Candida Albicans, Aspergillus Brasilensis

Accreditation

GMP (Good Manufacturing Practice) for cosmetics - ISO 22716

Production laboratory

  • Eurofins Pharma Quality Control (ACE), Les Ulis, FRANCE
  • Eurofins BioPharma Product Testing, Milan, ITALY
  • Eurofins BioPharma Product Testing Hamburg GmbH, Hamburg, GERMANY
  • Eurofins BioPharma Product Testing Munich GmbH, Planegg, GERMANY
  • Eurofins EVIC Spain, Barcelona, SPAIN
  • Eurofins Lancaster Laboratories, Dungarvan, IRELAND
  • Eurofins Bel/Novamann s.r.o., Nové Zámky, SLOVAK REPUBLIC
  • Eurofins Bactimm, Nijmegen, THE NETHERLANDS
  • Eurofins AMS Laboratories, Sydney, AUSTRALIA
  • Eurofins Experchem Laboratories Inc., Ontario, CANADA
Locations
Cosmetics Laboratories
Map of cosmetics testing laboratories

 

Clients