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Sodium chloride solution in shampoo
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.
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4 Replies
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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.
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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
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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
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@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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