Product Improvement

Testing Stability of Your Cosmetic Formulation

Language: English
Length: 90 min
Recorded on: 09 Apr 25

Package Includes

6 months access to Course Recording, Presentation Slides, Q&A Transcript

Course Description

Ensure your new or revised formula meets chemical, physical, and microbiological quality standards. Confidently eliminate unstable batches by optimizing your cosmetic product testing—(stress testing, microbial testing, accelerated & long-term stability). Organize and combine tests effectively to identify formulations that pass faster!

Eric Abrutyn will discuss how to achieve reliable results (what test, in which conditions…) & how to assess the impact of external factors (packaging, transport…) on end-product stability.

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Eric Abrutyn
Eric Abrutyn
TPC2 Advisors Ltd.
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Eric Abrutyn is a graduate of New York University-New Paltz with a Masters in Chemistry and of C.W. Post College/Long Island University with a B.S. in Chemistry.

He has over 45 years of experience in the personal care cosmetics industry. Eric is a member of the Technical Advisory Board and past-contributing editor for Cosmetics & Toiletries magazine. He is also contributing author and instructor for SpecialChem, and is a 20 yr member (and past chair) of the International Nomenclature Committee (INC)—part of Personal Care Products Council’s (formerly CTFA).

Eric has actively participated in the Society of Cosmetic Chemist for over 40 years, serving as Chair of Midwest and Ohio Valley chapters, Area II Director, Editor of New York Cosmetiscope, and various positions at the local and national level.


In 2009, Eric Abrutyn established a consulting firm – TPC2Advisor’s Ltd., Inc., utilizing his extensive and diverse experience to focus on supporting clientele in the areas of-

  • Antiperspirant technology, application, and performance testing.
  • Siloxane technology/applications and replacement products.
  • Skin and hair care formulation and product performance testing, and technology/marketing assessment.
  • Personal Care Cosmetic labeling with specific emphasis on INC nomenclature and registration, and Technology Strategic planning and Ideation.
  • Strategic communication to clients and customers

    Besides working as Senior Principle Scientist for Kao Brands, Eric has worked for Dow Corning as a Senior Technical Service Scientist in the field of silicone chemistry, and Wickhen Products as Director of R&D in the field of antiperspirants, esterification, spray drying, free-radical polymerization, and controlled release. He has contributed broadly in the fields of hair care research, skin care product development & underarm product development.

    Eric holds over 15 patent; he is contributing editor/author for 4 book; teaches courses in siloxane technology & application, and antiperspirant/deodorant technology, application & and product performance. He is author of many technical articles, and numerous presentations in the field of antiperspirants, polymerization, controlled release, and silicone applications.

Participants of this course includes

Why should you view this course?

Regulation requires that any cosmetic product has guaranteed stability & integrity until its shelf-life. It takes a lot of time to run stability tests, and we all want to avoid as much as possible stability issues in the final development steps… which would imply starting everything all over again! That’s exactly why we are offering this course, because (too) many formulators still run stability tests by habit, and there is a better way! Join & learn to:

  1. Define reliable & efficient test plan to best combine predictive tests (accelerated / long-term testing, micro testing...) depending on your formulation (highly viscous...).

  2. Better assess shelf-life of your product by reviewing how to play with parameters that can affect or accelerate stability (light, temperature, moisture, agitation…).

  3. Minimize the occurrence of "unfortunate surprises" by understanding the effects of test equipment and packaging (interaction with container material and label...).

Who should join this course?
  • Cosmetic Formulators, technicians, R&D people, and Process developers

  • Complete the course and (unlock your personalized certificate)– your badge of accomplishment awaits!

  • This course is suitable for beginner level proficiency
    Beginner
Course Outline

Defining and understanding stability

  • Definition
  • Regulatory guidelines
  • Types of stability (preliminary, initial, pilot plant, plant trial)
  • Parameters affecting stability

Predictive tests

  • Types of stability tests (accelerated/long term, stress studies...) and how to combine them
  • Test conditions
  • How to choose the right test for your formulation (solid, semisolid, liquid): you shouldn't do it by habit!
  • Interpretation of the results

Testing equipment and facilities

  • Procedure for pH Measurement​
  • Viscometer/ Rheometer
  • Turbidity Meter
  • Fisher-Johns Melting Point Apparatus
  • Centrifuge
  • Photo-Stability Measurements

Packaging considerations (interaction...)

  • Glass
  • Plastic

Conclusions and Key Takeaways

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