Our stability testing for cosmetics is based on protocols designed to test the cosmetic product attributes that are susceptible to change during storage. These attributes may influence cosmetic product quality, safety and performance. We evaluate product quality at specific time intervals during storage under controlled conditions.
Why stability testing is important
Stability testing for cosmetics ensures that a product maintains its intended physical, chemical and microbiological quality and properties, as well as its functionality and aesthetics when stored under suitable conditions.
When is stability testing necessary
You must have stability testing performed when:
Developing new products.
Reformulating already marketed products.
Modifying your production methods.
Shifting production to a new manufacturing site.
Modifying your product packaging.
Altering the type and the material of the container.
What we test for
We offer a comprehensive range of stability tests for cosmetics to meet your needs. Our experienced scientists determine the best and most cost-efficient stability test for you.
We mainly aim to estimate the stability of a cosmetic product over its shelf life. Our tests focus on:
Organoleptic properties – appearance, colour, odour and texture
Physical-chemical properties – pH, weight, assay of preservatives
Microbiological parameters – microbial count and preservation efficacy test
Compatibility – between the product and the container
Functionality and aesthetics – when stored under suitable conditions
We evaluate storage product quality at specific time intervals under controlled conditions. Samples are kept in elevated temperature and humidity conditions, depending on the product type and the market needs.
We offer a comprehensive range of stability tests:
3, 6, 9-month stability
Photostability based on ICH Topic Q 1 B
Period after opening (PAO)
If you are based in the EU, we offer 24-hour courier service.
The products are stored under specific conditions, including:
RT (25°C/60% RH)
Accelerated thermal stability (40°C/75% RH)
We apply quality control processes throughout the stability tests, including:
Monitoring of physical characteristics – UV filters, heavy metals, active ingredients, microbial enumeration, challenge testing and preservatives.
In our tests we take into account the latest guidelines on stability testing:
ICH Topic Q – Stability Testing of new Drug Substances and Products