Home Cosmetic Science Talk Formulating emulsion stability

  • emulsion stability

    Posted by Avick on April 22, 2014 at 4:45 pm

    Looking for standards for evaluating emulsion stability.

    What temperatures and timeframes are typically used to evaluate the stability of emulsions?

    Thanks for any guidelines.


    Zink replied 10 years ago 3 Members · 5 Replies
  • 5 Replies
  • Avick

    April 23, 2014 at 9:30 am

    Am I asking the wrong type of questions?

  • Bobzchemist

    April 23, 2014 at 10:13 am

    No, it’s just a question with a very long answer.

    The CTFA once wrote a monograph on this subject. A quick search turned this up:

    If you do a search on “evaluate the stability of cosmetic emulsions” you should get more information.
  • Avick

    April 23, 2014 at 10:35 am

    Thanks, Bob. I am in trial-by-fire training here. Appreciate your suggestions so much!

  • Bobzchemist

    April 23, 2014 at 11:22 am

    Quick-and-dirty evaluations can be done with a small centrifuge, but there’s not a perfect correlation - you still need to run the stability tests.

  • Zink

    April 23, 2014 at 3:58 pm

    What’s the centrifuge methodology? Can it in your experience give a lot of false positives? (i.e. if it fails centrifuge test it can still pass accelerated stability).

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