Our Lab Services / Specialized Service
Cosmetic Stability Testing
Validating cosmetic formulations before manufacturing transfer to ensure consistency, safety, and full shelf-readiness.
Why Is Cosmetic Stability Testing Important?
Cosmetic stability testing is a critical phase that bridges laboratory development and mass production. The goal is to ensure that the developed product maintains its properties throughout its entire shelf life.
- ■Preserving Product Quality: Verifying that fragrance, color, and texture remain unchanged over time.
- ■Preventing Phase Separation: Testing that emulsions (creams/lotions) do not separate into oil and water phases under varying temperature conditions.
- ■Packaging Compatibility: Verifying that the formula does not react with packaging materials (plastic, glass, aluminum).
- ■Manufacturing Confidence: Minimizing financial risk before investing in large-scale production batches.
What Is Tested During Stability Evaluations?
- ■Viscosity testing and texture change monitoring over time.
- ■pH level tracking and chemical stability verification.
- ■Structural stability testing under extreme heat and cold conditions (stress testing).
- ■Formula-to-packaging compatibility testing (compatibility studies).
- ■Preservative system efficacy testing (challenge testing) in a controlled lab environment.
Who Is This Service For?
- ■New cosmetic brands preparing for product launch.
- ■Manufacturers seeking to validate new formulations through an independent laboratory.
- ■Companies performing product upgrades (reformulation) requiring re-validation.
- ■R&D teams looking for professional support during the scale-up process.
How Does Testing Fit Into the Process?
Stability testing is an integral part of the product development and manufacturing transfer process. It provides the final confirmation that the formula is safe and stable enough to move from the laboratory to the production line.
Learn about the full development process →Why Conduct Testing at a Professional Lab?
- ■Years of hands-on experience in interpreting results and formulation testing.
- ■Full control of laboratory conditions with precision measurement equipment.
- ■Reliable results that provide confidence to both brands and manufacturers.
- ■Comprehensive support and consulting based on findings for formula optimization.
Frequently Asked Questions
Answers to common questions about this service.
Stability testing verifies that the product remains safe, stable, and intact throughout its entire shelf life, preventing unexpected color changes, odor shifts, or phase separations after market launch.
Accelerated stability testing typically takes 12 weeks (3 months) in the laboratory, simulating approximately two years of shelf life under normal conditions, providing full confidence ahead of mass production.
This is a test that examines the interaction between the chemical formula and the packaging material (plastic, glass, etc.). We verify that the packaging is not compromised by the product and that the formula does not change as a result of contact with it.