Home Cosmetic Science Talk Formulating General Is the salysalic acid easy dissolved in liquid soap?

  • Is the salysalic acid easy dissolved in liquid soap?

    Posted by Fekher on July 22, 2022 at 6:21 pm

       I see always that dissolving SA needs prediluation in MPG, or glycerin with adequat ratio.
     
     Then I tried to dissolve 1% of SA directly in basic liquid soap containing just SLES and  CAPB as surfactants , it seems that SA is easy dissolved in liquid soap so is it really dissolved or just dispersed to very small particles wich give impression that it is dissolved? 
     
      I remark that the quality of foam is improved with being more creamy. Is there any influence between SA  and foam quality?

     @ngarayeva001 @Perry @Graillotion @chemicalmatt @Pharma @PhilGeis 

    Fekher replied 2 years, 5 months ago 4 Members · 14 Replies
  • 14 Replies
  • MarkBroussard

    Member
    July 22, 2022 at 11:24 pm

    @Fekher

    Yes, SA is soluble in some surfactants.

  • Fekher

    Member
    July 22, 2022 at 11:40 pm

    Thanks for the answer @MarkBroussard
     Just update I tried the product in my hair so SA is not known as hair conditioner however I feel that it gives some conditioning effect for the hair near to the PQ 7.

  • Abdullah

    Member
    July 23, 2022 at 8:04 am

    I once easily dissolved up to 14% salicylic acid in 10% surfactant solution. Product was clear. Didn’t add anymore to not waste the ingredients.

  • Fekher

    Member
    July 23, 2022 at 9:07 am

    @Abdullah interesting news thanks for sharing knowledge, just didn’t you pass the maximum level of use with 14% ? it seems in such level pharmaceutical reason maybe.
     Same for my product today transformed to crystal clear. 

  • Abdullah

    Member
    July 23, 2022 at 9:33 am

    It was just an experiment to see what happens ????. I was not going to use or sell that product. 

    I love doing experiments and as I usually purchase ingredients in bulk, I don’t have problem doing a lot of experiments so i mix whatever ingredients i have in different ways that comes to my mind just to see what happens. Some times i get pretty good results but most of the time i learn what i should not do. 

  • Fekher

    Member
    July 23, 2022 at 9:40 am

    @Abdullah welcome to curious chemists group ????????????, I have similar mentality wich makes a lot of fun but mind burns ????
      Just with your  SA experience you discovered very interesting solvent system 10% for 14% 

  • Abdullah

    Member
    July 23, 2022 at 10:03 am

    Fekher said:

    @Abdullah welcome to curious chemists group ????????????, I have similar mentality wich makes a lot of fun but mind burns ????
      Just with your  SA experience you discovered very interesting solvent system 10% for 14% 

    Yeah ????

  • PhilGeis

    Member
    July 23, 2022 at 10:47 am

    Wouldn’t the Na salt be more cooperative?

  • Abdullah

    Member
    July 24, 2022 at 12:51 am

    PhilGeis said:

    Wouldn’t the Na salt be more cooperative?

    Generally it is. 

    Only advantage of sa is you can use small amount to reduce pH too.

  • Fekher

    Member
    July 24, 2022 at 7:38 pm

    @Abdullah @Pharma @PhilGeis the strange thing for me that pH decreased moderately, my suspect  is the presence of surfactant?

     However I didn’t find scientific explanation any one have please? 

  • MarkBroussard

    Member
    July 24, 2022 at 8:23 pm

    @fekher:

    Van der Waals forces … the intermolecular forces between the solvent (surfactant) and solute (SA) are stronger than the intermolecular forces between solute-solute and solvent-solvent, so the SA dissolves in the surfactant.

    As for pH … the reduction in the pH of the solution is dependent on the pH of the surfactant.

  • Fekher

    Member
    July 24, 2022 at 9:03 pm

    @MarkBroussard get it about affinity but the question will be why the pH of surfactant decreased moderately? 

  • MarkBroussard

    Member
    July 24, 2022 at 9:18 pm

    @Fekher:

    That would all depend on how much surfactant you have, the pH of the surfactant and how much SA you’re adding?

  • Fekher

    Member
    July 24, 2022 at 9:30 pm

    Thanks a lot @MarkBroussard 

Log in to reply.

Chemists Corner