• Formulating

  Issues with stability of an acidic solution

  Posted by Anonymous on November 14, 2018 at 10:42 pm

  Hi to all !

  I am having issues maintain stability for an acidic formula. I am suing the traditional hydroxucellulose and cetearyl alcohol ceteareth -2o . After formulating the formula looks fine- though after a week it starts to loose its viscosity and thickness.

  I usually don’t heat up he cellulose to 75 degrees- is it criticall?
  Should I increase the water phase acidity pre to additng the active acid ingredient?

  PLEASE Help me out. I am lacking the knowledge to solve this by myself.

  chemicalmatt replied 5 years, 5 months ago 2 Members · 3 Replies

  • formula help
  • hair care
  • ph
  • stability testing
  • viscosity
• 3 Replies

• 

  ChrisV

  Member

  November 15, 2018 at 7:00 am

  Hi Keren! pH of the formula? And maybe acidity of the mixture? I usually go with xanthan gum at acidic media.

• 

  Anonymous

  Guest

  November 15, 2018 at 7:40 am

  round 2 . Thanks for your replay…

• 

  chemicalmatt

  Member

  November 16, 2018 at 7:54 pm

  If you are using HEC, and not heating, then it is wise to allow 60 minutes mixing time, then add a TINY bit of alkali (AMP-95, NaOH 1.0%, ) to swell. Then proceed as usual. However, if you have a LOT of electrolytes in there at that low pH,  ChrisV’s recommendation is best, and dehydroxanthan works best when you are at really low (pH2.0?) 

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