Home Cosmetic Science Talk Formulating GHPTC - yes again

  • GHPTC - yes again

    Posted by Paprik on March 22, 2023 at 2:50 am

    Hello guys,

    here I am again with the same ingredient (will make me pull all my hair out 😀 ) Guar Hydroxypropyltrimonium Chloride.

    Yes, I am still struggling to incorporate it into a shampoo. Please see attached picture

    Very basic formula

    93.1% Water

    0.4% GHPTC

    6% Sodium Lauryl Sulfoacetate (SLAS)

    0.5% Liquid Germall Plus

    pH 5.4


    Added GHPTC into water vortex until fully dispersed. Added SLAS also under stirring and after put on heat to around 60°C until SLAS disolves (low shear).

    Wait until <40°C, added preservative and checked and adjusted pH with 40% citric acid solution. Result was normal, slightly viscous product, little bit bubbles, nothing crazy for 100g batch size. Would normally go away over night.

    The next day though?? On top of it a creamy layer appeared. It is not solid, it’s more like liquified soap bar. Anyone has any experiences with this?

    Any help would be appreciated. Thanks maties 🙂

    Paprik replied 1 year, 1 month ago 5 Members · 6 Replies
  • 6 Replies
  • Abdullah

    March 22, 2023 at 4:34 am

    I don’t have experience with such thing but a long time ago i once mixed i think pq10, EDTA and SLES and the color turned pink after a few minutes. I then made another batch with adding CAPB after pq10 and it had no problem.

    So my suggestion is use some CAPB or a nonionic surfactant after your cationic thing and see if the problem is solved.

    • fareloz

      March 22, 2023 at 5:19 am

      I think Abdullah is right. I just googled the component:

      Guar hydroxypropyltrimonium chloride is commonly used as a conditioning agent in shampoo formulations. It forms a coacervate with anionic surfactants from the shampoo formulation upon dilution

      So it seems anionic surfactant is causing the problem.

  • ketchito

    March 22, 2023 at 6:45 am

    I agree with previous comments. Add CAPB before your anionic. Also, make sure you have a good final viscosity, which also contributes to your product stability.

  • Perry44

    March 22, 2023 at 8:43 am

    Also, 0.4% seems high. We used a max of 0.2% and got clarity

  • Paprik

    March 22, 2023 at 12:39 pm

    Thank you guys!

    I was planning on adding Coca-Betaine after to increase viscosity, however firstly I wanted to check if the gum will hydrate properly/check stability.

    @ketchito told me once that GHPTC works best with anionic surfactant to create those coacervates.

    Soooo, the bottom line -

    1. Add Guar into vortex

    2. Add Coca-betaine

    3. Add anionic (SLSA)

    4. heat, preservative etc …

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