Hi there,
This may be another basic question, and I have researched online and cannot find the exact answer I am looking for. So would appreciate your help and advice. I have made a product which combines oils and butters (e.g. argan oil, avocado butter) with a liquid soap base - do I need to add a preservative? as the oils are anhydrous and the liquid soap doesn't have (need?) a preservative... If I do, which one(s) would you recommend?
The INCI for the liquid soap base is:
Aqua, Potassium Oleate, Potassium Cocoate, Glycerin, Potassium Citrate, Citric Acid
Thank you!! Jemma
Comments
The reason why some liquid soaps get away without preservation is that their pH is above 10.
In theory only... because a product with pH above 10 would make the skin feel quite awful - notice how whoever invented it went and lowered the pH with citric acid.
The product is now a disaster, not only it doesn't perform well, now someone ruined it's ingrown preservation system with the acid.