Glossary · Testing
Storage of a product at controlled temperatures, humidity and light to check that it keeps its look, smell, texture, pH and active content over its shelf life. ISO/TR 18811 gives guidance on designing stability tests for cosmetics.
Regulators and retailers expect this data before a product is placed on the market, and it feeds directly into the safety assessment and the product file.
Guires CSL formulation, testing, clinical and regulatory teams work with Stability testing on client projects every week, from the first brief to the final product file.
Safety & stability testingRelated terms
A test in which a product is deliberately contaminated with set microorganisms to check that its preservative system reduces them fast enough.
Read definition →Laboratory tests on cells, tissues or chemistry instead of animals, often called new approach methodologies.
Read definition →Regulations and standards are listed first, then peer-reviewed literature. Sources checked October 2026.
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