1,2,3-Propanetricarboxylate, 2-hydroxy-, mixt. with 2-(acetyloxy)benzoic acid, calcium phosphate and sodium hydrogen carbonate 1,2,3-Propanetricarboxylic acid, 2-hydroxy-, mixt. with 2-(acetyloxy)benzoic acid and sodium hydrogen carbonate 53663-74-4 Alka seltzer Alka-seltzer