Keywords: Para methyl red.png Original retrieved from http //pubchem ncbi nlm nih gov/summary/summary cgi cid 22650 PubChem database PubChem is a governmental website and thus http //www ncbi nlm nih gov/About/disclaimer html this image is in public domain http //pubchem ncbi nlm nih gov/summary/summary cgi cid 22650 loc ec_rcs Properties PubChem database 2010-07-09 PD-USGov Azo dyes Aminobenzoic acids |