Cosmetic Science Talk

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  • Catonic Surfactants

    Posted by Farion1989 on April 3, 2020 at 5:38 pm

    I’m trying to formulate a conditioner using Cetrimonium chloride and behentrimonium methosulfate. At what active percentage should I include in my formula for it to be a good conditioner? I would say up to 4% but what happens if I add more?

    Perry replied 2 years, 10 months ago 2 Members · 2 Replies
  • 2 Replies
  • Perry

    April 3, 2020 at 5:42 pm

    Cationic surfactants work by depositing on hair where there are negatively charged sites on the proteins on the fiber. Since there is a limited number of these sites, all the extra surfactant you put in the product will simply rinse down the drain. Whether 4% is the max depends on the level of damage on the hair.  However, that sounds pretty high to me. 2% is probably plenty.

    You just have to test though. Make a sample with more and test to see if you notice any combing differences.

  • Farion1989

    April 3, 2020 at 5:50 pm

    Also the Centrimonim chloride is also an emulsifier so would I need to add a different emulsifier? Should I add less behentrimonium methosulfate than Centrimonim?

  • Perry

    April 3, 2020 at 11:09 pm

    You’ll have to experiment to find out what you prefer. There is no simple answer to this.