• General

  Surfactants for AHA cleanser

  Posted by Storm on October 29, 2020 at 2:53 am

  Hi fellow formulators

  I’m having trouble choosing the right surfactants for a gentle AHA cleanser, pH=4.5, sulfate free.

  Below is what I have tested so far;

  1- 10% Sodium Cocoyl Glutamate (Plantapon ACG HC) in water

  - Reducing the pH to 5.0 using Lactic Acid, completely opaque, viscosity broke, after 5 minutes sitting without mixing, turned to an opaque gel.

  2- 10% Disodium Cocoamphodiacetate (Dehyton DC-AS) in water

  - Reducing the pH to 5.8 using Lactic Acid, completely opaque

  3- 10% Sodium Lauramphodiacetate in water

  - Reducing the pH to 4.5 using Lactic Acid, clear no sediment

  4- 10% Coco Glucoside or 10% Caprylyl/Capryl Glucoside in water

  - Reducing the pH to 4 using Lactic Acid, they both stay clear with no sediments.

  My questions are:

  - What is the best Anionic surfactant (sulfate free) option for pH around 4.5?

  - Why Cocoamphodiacetate is unstable at low pH while Lauramphodiacetate is stable?

  - Between Coco Glucoside and Caprylyl/Capryl Glucoside, which one has a better foam and milder?

  - Is there a source to compare surfactants mildness, foam and pH stability?

  Thanks for reading this long post and hope to hear your thoughts.

  Storm replied 4 years ago 1 Member · 1 Reply

  • formulating
  • surfactants
• 1 Reply

• 

  Storm

  Member

  October 29, 2020 at 3:19 am

  I’ve accidentally posted this under general category and had to repost under formulating as I can’t move this one!

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