Crystallization Problem

Hi, I made a simple water-based solution and the crystallization is observed after about 1 week. In the solution, the tiny particles (like dust) appear. Do you know what happend?
Here is formula:
1, Water            
    EDTA.2Na:     0.1
    Sodium Cocoamphoacetate:  2
2, Fragrance:      0.2
    Liceryl 12 (INCI: Glyceryl Linoleate (and) PEG-12 Oleate):  0.6
3, Saliguard EHGP:    0.6
    Propylene Glycol:   4
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Comments

  • chemicalmattchemicalmatt Member, Professional Chemist
    Mystery there. Nothing jumps out at me and everything appears to be miscible. Perhaps add a bit more amphoteric and see what occurs. That is the hydrotrope here.
  • PharmaPharma Member, Pharmacist
    What's the pH and did you put it (accidentally) in the fridge?
    Else, nothing suspicious.
  • 15011501 Member
    edited September 3
    Pharma said:
    What's the pH and did you put it (accidentally) in the fridge?
    Else, nothing suspicious.
    The pH is about 7-7.2 
    I put 1 sample in room temperature and another in incubator (45 degree C).
    Both have crystallization after 5-7 days
  • @1501 Maybe that level of sodium cocoamphoacetate might not be enough to keep some of your "oils" soluble. Can you try increasing it, replacing it by Laureth-7 or 9, or adding a solubilizer?
  • PharmaPharma Member, Pharmacist
    Weird...
    Do a knock-out test.
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