Is the salysalic acid easy dissolved in liquid soap?

General

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 1 year, 9 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