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ph of the solution (potassium cocoate, lauryl and coco glucoside)
Dear all,
I would like to lower the pH of the solution of potassium cocoate, lauryl glucoside and coco glucoside to the neutral value. The minimal pH that I am able to get without troubles is about 8,5. I am using citric acid. In lower pH values the solution becomes cloudy and separating.
Could you give me a hand please?
Martina
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4 Replies
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You’re not going to be able to lower the pH that low with Potassium Cocoate in the formula … Water + Coconut Oil + Potassium Hydroxide has a pH of 10.5 or so.
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Of course it will separate. As you noticed, below 8.5 a replacement reaction occurs.
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Thank you for the information.
So there is no chance to lower the pH using any other soap in the formulation.
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No. This is the crucial difference between soap and synthetic surfactants. I have tried to do exactly the same as you, that’s why I know what you saw. I bought potassium cocoate and tried to make a combo product with synthetics but the pH of course had to stay >9 so in the end … you realise that either soap OR synthetic is good, but not both. If you are not happy with your soap foam profile then change the fatty acid profile. Synthetics can easily match soap characteristics. It’s all a question of cost.
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