Hand wash gone wrong - why?


I'm trying to formulate handwash:
5.5% sodium coco-sulfate
1% Coco-glucoside and glyceryl oleate
1% Xanthan gum
0.5% Sodium Benzoate and 
1% Citric acid (50% solution)

It looks fine after a few days.( pH is 5.00) But the problem is that, after a few weeks the solutions has become cloudy and there are lot of white pieces in it - like some salt has appeared all of a sudden. Are some ingredients incompatible? Does anyone have a clue?


  • PerryPerry Administrator, Professional Chemist
    Did you do a preservative / microbial test?  It could be microbial contamination.
  • Preservative description remained incomplete - I'm using Sodium benzoate and Potassium sorbate blend. 

    @ Perry No, I haven't made a microbial test. I'm gonna do it right now!  Thank you for the tip.
  • Bill_TogeBill_Toge Member, Professional Chemist
    what's the pH?
    UK based formulation chemist. Strongest subjects: hair styling, hair bleaches, hair dyes (oxidative and non-oxidative) I know some stuff about: EU regulations, emulsions (O/W and W/O), toothpaste, mouthwash, shampoos, other toiletries
  • Bill_Toge pH is 5, even after the white pieces appeared.
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