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Thick Shampoo Issues-Is Sodium PCA the culprit?
I have someone working on a shampoo reformulation for me. The surfactants are Sodium C14-16 Olefin Sulfonate, coco betaine, and cocamide DIPA. These were all in the the original formula. He has added glycerin and Sodium PCA for added moisturization. I am not sure at what percentages, but now the formula is too thick and has a gloppy texture. I know that glycerin can cause thickening, but is Sodium PCA known to thicken? I just want to have some ideas of direction. It’s hard for me since I am not the one doing the work and can’t see what exactly has been done.
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2 Replies
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Since Sodium PCA is a salt, I would guess that it can affect the viscosity. You could probably do a salt curve analysis using the ingredient to plot how it affects viscosity in your system.
PS: Incidentally, I’d say glycerin is not of much use in the shampoo and neither is the water soluble Sodium PCA. They both just wash down the drain when the shampoo is rinsed out.
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Thanks Perry. This is an existing formula at a new company I started working at a few weeks ago and it confused me. I don’t have access to the entire formula since it is being done by a contract manufacturer, so I am having to guess at the changes to make.
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