-
AHA gel problem
I have a problem with AHA. I want to make a gel for the face with Carbopol ® Ultrez 30 but when I add the AHA it loses its viscosity, it becomes like water with ph 3-4. What’s wrong? Should I change another modified rheology? I also have Aristoflex Velvet, and Natrosol™ 250HX. What to do;
-
2 Replies
-
Nothing wrong, these gel-formers do not tolerate low pH and electrolytes. It’s better to read recommended usage from manufacturer before trying.
I would suggest to use gums instead. For example Xanthan Gum, very reliable thickener. Or Hyaluronic acid (high molecular).
-
@fareloz is right to suggest using saccharide gums, although even some of these can diminish in viscosity with time at low pH. Historically we used nonionic alkyl ethoxylates (e.g. Ceteareth-12, Steareth-2) to make emulsions at extreme ends of the pH scale. If you don’t mind that dreaded “-eth” in your LOI, that is.
Log in to reply.