Keywords: Sudan-I-3D-balls.png Ball-and-stick model of the Sudan I molecule an orange-red azo dye used as a food colouring Derived from File Azobenzene-trans-3D-balls png and File Methanol-alternative-3D-balls png 2010-07-25 Jynto and Ben Mills Azo dyes Ball-and-stick models 2-naphthols Images by Jynto |