• General

  Salicylic acid

  Posted by Oladoo on June 16, 2021 at 7:27 pm

  Please how can I dissolve salicylic acid without using alcohol?

  Thanks

  Oladoo replied 2 years, 11 months ago 5 Members · 7 Replies
• 7 Replies

• 

  PhilGeis

  Member

  June 16, 2021 at 11:21 pm

  use sodium salt

• 

  MarkBroussard

  Member

  June 17, 2021 at 3:24 am

  @Oladoo

  Dissolve the SA in 25-30% solvents ( some combination of Methylpropanediol, Pentylene Glycol, Propanediol, Butylene Glycol, or Methyl Gluceth-20 ) heated to 70C or so.  Prepare a heated water phase comprised of water + 1% Sodium Citrate.  You can also add-in 2.5:1 Cocamidopropyl Dimethylamine:SA to the water phase.

  Add the Glycol/SA solution to the water phase solution and allow to cool to RT.

  Finally, adjust the final pH of your concoction to 3.5 - 4.0

• 

  ngarayeva001

  Member

  June 17, 2021 at 10:45 pm

  I use combination of propylene glycol and ethoxydiglycol at around 30% combined. The latter has less sticky feel. And Polysorbate 20 as a surfactant. 

  May I please ask the function of sodium salt?
• 

  Abdullah

  Member

  June 17, 2021 at 11:57 pm

  @ngarayeva001 they convert salicylic acid to sodium salicylate

• 

  PhilGeis

  Member

  June 18, 2021 at 2:10 pm

  the salt is soluble

• 

  Oladoo

  Member

  June 18, 2021 at 4:54 pm

  Thanks all. Your comments were very helpful

• 

  Oladoo

  Member

  June 18, 2021 at 4:55 pm

  How much Polysorbate 20 do I need to add? Though I have Polysorbate 80 @ngarayeva001

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