• Formulating

  Salicylic acid 20 %solution

  Posted by Anonymous on November 13, 2018 at 3:14 pm

  Hello
  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 

  chemicalmatt replied 6 years, 7 months ago 2 Members · 2 Replies
• 2 Replies

• 

  em88

  Pharmacist

  November 14, 2018 at 9:50 am

  You can add more ethanol and make sure ethanol is not evaporating. 
  I’d suggest to weight your ingredients and not use volume. 

• 

  chemicalmatt

  Member

  November 14, 2018 at 10:11 pm

  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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