• General

  pKa measurement

  Posted by Shams on February 24, 2022 at 11:07 pm

  Hi everyone,
  we are formulating some chemical peels using salicylic acid and lactic acid . These are only sold in professional clinics.
  One of our clinics asked to know the pKa of our peels.
  We have the pH set at 2.00 - 3.00.
  Can someone please help out how to measure the pka from pH?

  TIA

  Mayday replied 2 years, 10 months ago 2 Members · 1 Reply
• 1 Reply

• 

  Mayday

  Member

  February 25, 2022 at 12:09 am

  pK_a is mathematically derived from the K_a, or the acid dissociation constant. It doesn’t make any sense for your overall formulation to have a pK_a, since that is used to describe the strength of a single acid in solution. There may be a miscommunication as to what information they want about your formula.

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