Service
Cosmetic stability testing service.
Stability testing proves your product stays safe and unchanged across its shelf life, and earns the durability date on the pack. We run the study through our accredited laboratory and report data your safety file and your label both rest on.
Reviewed by Cassandra Maddocks, chemist & biochemist · last reviewed 28 July 2026
Stability testing, run and reported.
We store your product under accelerated and real-time conditions and monitor pH, viscosity, colour, odour, appearance and microbiological quality across its shelf life, then report data that supports the durability date or period-after-opening on your label. It is the study that earns the number on the pack.
The conditions, timings and PAO link are detailed in our stability testing guide.
What is included?
Accelerated storage at around 40 to 45C, real-time storage at ambient, low-temperature and freeze-thaw stress, centrifugation and, where relevant, photostability, with each checkpoint recording the physical, chemical and microbiological parameters. You receive a report supporting your shelf-life and period-after-opening claims, documented per ISO 22716.
Stability is the long pole in any launch calendar, so we start it early.
How much does it cost and how long does it take?
It is quoted per product. An accelerated study runs about three months; a real-time study covers the full claimed shelf life, so it should begin during product development rather than after everything else is ready. We scope and price it up front, and the data reuses across the EU, UK, Swiss and US files.
Tell us your product and intended shelf life: request a testing quote.
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