Cosmetics Formulation Development

Hello to all the team, I would like to ask Glycolic Acid (AHA) 100% Powder uses 4%, the rest is น้ำกลั่น pH..?.. of What is the formula, thanks

Hi, if there are no other elements in the formula, just glycolic acid and water. The pH is approximately 1-2. This figure is an estimate. Actual numbers must be measured only by glycolic acid Each lot of production has a different pH value.