Overview
ISO 11930 preservative effectiveness testing (PET), also known as a preservative challenge test, evaluates the ability of a cosmetic or personal care product to resist microbial contamination over time. This method is widely used to support product safety, stability, and regulatory compliance.
Test Method – ISO 11930
Samples are intentionally inoculated with a panel of challenge microorganisms (typically including bacteria, yeast, and mold). The product is then monitored over a defined time period to assess the reduction and control of microbial populations in accordance with ISO 11930 acceptance criteria.
No Suitability (What This Means)
This service does not include suitability (neutralization) testing, which verifies that the product matrix does not interfere with microbial recovery. It is generally appropriate for:
For preserved or complex formulations, suitability testing is typically recommended to ensure accurate and defensible results.
Applications
Key Benefits
Pentyl Labs provides accurate ISO 11930 results with clear Criteria A/B decisions, full suitability evaluation, and compliance-ready reporting.
📧 [email protected]