I am trying to formulate my own natural olive oil bodywash. I am at the point where I'm having problem with pH adjustment because when I add 0.5% citric acid, it becomes watery instantly. Current pH is 8-9 and I want to reduce it to preferably pH 5.5. I got the concentrated olive oil liquid base soap from the store, so I don't really have an idea of the percentage. But here's the ingredients:
Olive oil liquid soap base:
Aqua, Sapofinied Olive Oil, Glycerine, Potassium Citrate, Citric acid
Dilution with distilled water: 1:5
To increase foaming & viscosity I add:
1. Cocamidopropyl Betaine 6%
2. Coco glucoside 3%
3. Lauryl Sulfoacetate 1%
and Fragrance 2%.
Here's where the problem lies, the pH is too high and makes my skin dry too. I can't seem to fix the pH with citric acid (0.5%) because it ruined my bodywash viscosity which I already liked. How can I fix this?
Thank you all