I notice that PROLEVIUM is widely pH stable. Can my customer use this at pH 3 for a salicylic acid treatment?
The answer is YES. Please see formula SC-354 in the datasheet. Keep in mind that performance testing is concentration and formulation dependent, among other parameters. We ran TEWL at a skin tolerant pH of around 6 and in a bland carrier so as to show the performance aspect without raising questions as to the effect of the vehicle. Your customer should perform testing on his/her own formula.