Does propylene glycol prevent parabens from falling out of solution?

Parabens are just too water insoluble
Methylparaben 0.16%  @ 15 C
Propylparaben 0.023%  @ 15 C
These figures are well below the EU regulations maximum allowed (0.4% and 0.15%)

Does propylene glycol "cling" to parabens molecules and prevent them from precipitating in water?


  • chemicalmattchemicalmatt Member, Professional Chemist
    Parabens are soluble in propylene glycol and other diols. See Germaben II or other preservative combos using this attribute.
  • Parabens you need to heat and dissolve in glycerin and in hot condition only you need to add to your  base.
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