Home Cosmetic Science Talk Formulating Sodium chloride solution in shampoo

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  • Sodium chloride solution in shampoo

    Posted by Mssthng052 on February 19, 2023 at 3:14 pm

    Hello. I am formulating a shampoo where I would need sodium chloride to thicken it. I’ve been using fine powdered sodium chloride but I’ve noticed some kind of settling at the bottom. I wanted to know if if a 0.9% saline solution will work to thicken without causing instability issues being it’s added water? Here’s my basic formula:

    Aqua—54.7%

    Panthenol powder—2%

    Chelator (aqua, sodium phytate, alcohol)—0.3%

    Cocoamido. Betaine/glyceryl laurate—12%

    Sodium methyl lauroyl taurate—7%

    Disodium lauryl sulfosuccinate—2%

    Coco-glucoside/glyceryl oleate—2%

    Sodium lauroamphoacetate—5%

    Decyl glucoside—8%

    Geogard ect—0.8%

    Glycerin

    Cationic guar gum

    Citiric acid—qs

    Citric acid—qs

    Sodium bicarbonate—qs

    Sodium chloride powder—qs

    My pH is normally about 6.2 but I noticed it’s thicker at a ph of 5.3-5.9. Please help, any tips are worthy. Thanks for reading.

    Mssthng052 replied 11 months, 1 week ago 3 Members · 4 Replies
  • 4 Replies
  • paprik

    Member
    February 19, 2023 at 4:29 pm

    Remove Lamesoft PO 65 and you should be fine.

    Also process the Guar gum correctly, I had recently some headache with it (read my post from couple days ago about it if not sure 🙂 ).

    I don’t think NaCl would cause any instability.

    The higher viscosity at lower pH is probably due to higher presence of citric acid (pH adjuster) -> more shielding -> more cylindrical micelles -> higher viscosity.

    • Mssthng052

      Member
      March 26, 2023 at 10:55 pm

      Thank you Paprik! I believe that was what needed to be done. I will observe it over several days to make sure, but thanks again. Come to think of it, I think you commented on someone else’s forum that I was reading a while back- I remember your name

  • Mssthng052

    Member
    February 20, 2023 at 1:04 am

    Thank you for replying. I will try that and let you know how it goes.

    I read your forum about Guar HPTC but my version is a low molecular weight so it‘s not like a thick gel settling as I had in the past using a higher molecular weight Guar HPTC. This time around it just looks like some powder of some sort or something but nothing gelatinous, and it moves when I turn the bottle upside down. I am aware that how/when I add my surfactants matters also, but in the literature it said I could add the Guar HPTC after the addition of my surfactants, where I would then adjust my ph 5.0-5.5.

    I don’t want to overcrowd the pot so i will try to remove the lamesoft 65. Thanks again

  • ketchito

    Member
    February 20, 2023 at 5:33 am

    @Mssthng052 Could you try replacing Sodium bicarbonate by Sodium hydroxide, or removing it if you don’t need to raise the pH?

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