 Prof. Scott also states that Alcian green was merely a mixture of Alcian blue and Alcian yellow and not a single compound, which is also supported by thin layer chromatography data from various sources e.g.works by another dye expert Prof. R. W. Horobin—one of the two chief editors of the 10th edition of the 75-year-old "Conn's Biological Stains Manual" published on behalf of the Biological Stain Commission.Alcian yellow is an azo dye having neither a phthalocyanine ring nor any of the colors of the Kingfisher, but in common with Alcian blue, has hydrolyzable charged thiouronium side-chains and similar stability of the final stained product.