I'm having a difficult time dissolving 2% salicylic acid. I’ve read over numerous of forums and here as well but I did not find any answers. I don’t want to incorporate any alcohol in the formula. I’ve tried using propylene glycol with heat, which seemed to work but after a day SA started to recrystallize. I tried to increase the amount of propylene glycol and again it was unsuccessful.
Does anyone have any idea what went wrong? Any advice would be helpful. Thank you guys!
Comments
Though for a feet callus remover I used MPG, 2% Salicylic Acid, DPG and a surfactant to aid in solubility. I have a stable formula with no recrystallization even after months.
http://www.innovadex.com/documents/1126638.pdf?bs=4678&b=195800&st=1&sl=28010429&crit=a2V5d29yZDpbc2Fsdm9uYV0gPiBJbmdyZWRpZW50cw==&k=salvona
Thanks for responding guys!
I'm trying to make a very basic 2% clear salicylic gel for acne/blemish skin with pH ~3.5. I've used propylene glycol to dissolve salicylic acid with the aid of heat. Then I incorporated this mixture into the gel I preped prior using hydroxyethylcellulose. Glycerin was also added along with other extracts in this gel. That was pretty much it!
Any thoughts?
If you are making a face wash it should stay.
I've found ethoxydiglycol/diethylene glycol monoethyl ether works well at low levels (1-2%)
also, at my last workplace we produced a medicated shampoo with 2% salicylic acid, about 11% active SLES and no organic solvents; provided the batch was heated to 40-50°C prior to addition, and the salicylic acid was given enough time to mix in (1-2 hours for a 5000kg batch), we had no solubility issues even at low temperatures
https://chemistscorner.com/cosmeticsciencetalk/discussion/222/acidic-scar-healing-lotion-curdled-under-cooldown-help-me-fix-my-recipe#Item_10