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Formulating Salicylic Acid in a Facial Cleansing Toner
Nowadays facial cleansing toner that contains salicylic acid is my new born project…As all we know it is alcohol soluble and in water it precipitate…Is there any trick of formulating salicylic acid with water-alcohol mixture…
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17 Replies
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Well, I’ve found that is generally is most stable at a pH between 3.5 and 4.0. But, you simply dissolve the SA in whatever alcohol you’re using and run experiments to figure out the alcohol/water ratio that keeps the SA in solution. You’ll generally need at least 20% alcohol, perhaps closer to 30%.
What I do is make a stock solution of 10% SA in alcohol and slowly add this stock solution to water to get the concentration of SA that I am targeting … usually in the 1% to 2% range.You can also eliminate this by using an encapsulated SA or natural salicylate extracts that are water soluble, but they are substantially more expensive than Salicylic Acid. -
Yup try propylene glycol and little surfactants. Does help a lot as I was able to keep it clear nd solubilized.
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If you dissolve 1% sodium citrate in the water, I think you might find that solves your problem.
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See the Sulfate-free Facial Wash Gel
with Salicylic Acid
US-00536-80-44 on UL Prospector. It’s what you’re looking for. -
Can someone tell me how to formulate an organic face wash with salicylic acid?
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Yes. If the formula I suggested isn’t organic enough, first you will need to hire a chain saw and find some willows. Near water, they are, usually.
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@Diadem, lookup in the free formulas section on the chemistcorner website (not the forum). Most of people here create formulas as their main job and charge for it.
You can post your formula that doesn’t perform as you want and ask for a piece of advice but you cannot ask someone to write it for you.
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A bit of topic, SA dissolves in PG at quite a high concentration if you heat it to 70C. I managed to dissolve 30%. The trick is to cool it down and then add to water very slowly (if making a toner). Is there a reason why SA shouldn’t be heated?
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ngarayeva001 said:Is there a reason why SA shouldn’t be heated?No, none. SA is very stable.
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Thank you @Pharma!
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I dissolved 15% Salicylic acid into 1 ,3-propanediol with 7% Glycine Betaine (Beta vulgaris (Beet)) Sugar Extract. Now, when I tried to add it to water all of the salicylic globbed up, not sure why, I’m not that far into my experiments and learning yet but would love any insight.
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The solvent is simply diluted too strongly and that’s why salicylic acid falls out.
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Is it cold? I added 30% SA (70% PG 30% SA) to water. It should be done very slowly and both water and SA/PG should be room temperature (20C)
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@ngarayeva001 yes, all of mine were room temperature. Need to play with it more, wondering if it would work better in an emulsion and I’ve seen 15% SA solution with only Propaneidol at a couple of online sellers so thought it should work.
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It will work but the texture isn’t very pleasant in my opinion.
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@Belassi
chainsaw imagine -
Belassi said:Yes. If the formula I suggested isn’t organic enough, first you will need to hire a chain saw and find some willows. Near water, they are, usually.
@ngarayeva001
Why room temperature? I always heat the salicylic acid mixture to 70C and also add it to the water phase at 70C. After that I raise the pH to at least 3-3.2 when it’s still hot. If I wait too long with adjusting the pH in the cool down, the SA starts to precipitate. Later at room temp I do the final adjustment.
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