Keywords: Phenol-red-high-pH-3D-balls.png Ball-and-stick model of the phenol red molecule a pH indicator as it appears in an alkaline solution having a red-violet color Derived from File Phenol-red-zwitterionic-form-3D-balls png 2010-08-28 Jynto and Ben Mills Phenol red Ball-and-stick models Images by Jynto |