Discussions tagged with 'citric acid' NoviceKarel Adding citric acid (PH) and butylene glycol (freezing) to the formulation NoviceKarel replied 6 years ago 2 Members · 2 Replies Formulating Anonymous How much citric acid to add to a liquid to drop pH down 2 points Anonymous replied 7 years, 12 months ago 3 Members · 5 Replies Formulating Viewing 21 - 22 of 22 discussions ← 1 2