Keywords: Naphtholphthalein-3D-balls.png Ball-and-stick model of the naphtholphthalein molecule shown here in its low-mid pH form Derived from File Phenolphthalein-colourless-low-pH-3D-balls png 2010-08-27 Jynto and Ben Mills PH indicators 1-naphthols Phthaleins Ball-and-stick models Images by Jynto |