• Formulating

  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.

  AV

  Zink replied 10 years, 10 months ago 3 Members · 5 Replies
• 5 Replies

• 

  Avick

  Member

  April 23, 2014 at 9:30 am

  Am I asking the wrong type of questions?

• 

  Bobzchemist

  Member

  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:

  http://doc.baidu.com/view/67032e65f5335a8102d2202a.html

  
  

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

  Avick

  Member

  April 23, 2014 at 10:35 am

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

• 

  Bobzchemist

  Member

  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

  Member

  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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