Citric acid to change pH
HiCan anyone help me with Citric Acid? I would like to use citric acid to control pH of my cream and lotion. Can anyone tell me how much citric acid (anhydrous - powder form) I need to add to change (0.5 to 0.7) pH?I also don’t know how to use it? Should I add citric acid in water phase before heating or should I add in cool down phase after formulation? If I need to add in cool down phase after formulation, how can I add powder form of citric acid? Any comments or suggestions will be really appreciated?
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