• 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, 7 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).

Log In to Reply