Salicylic acid 20 %solution

Im trying to make 20%salicylic acid solution 
I mixed the SA with 20ml ethanol and complete to 100 ml with Propylene Glycol 
It disoolved and make a clear solution with aid of heat... But after while Crystal formed again  . So i need help what can i do to make it stable 


  • You can add more ethanol and make sure ethanol is not evaporating. 
    I'd suggest to weight your ingredients and not use volume. 
  • chemicalmattchemicalmatt Member, Professional Chemist
    IF you can live with some little benzyl alcohol or phenoxyethanol in your formula, those two will increase SalAc solubility and are miscible with PG too. 
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