Fay, Irving W. (Irving Wetherbee), 1861-1936 · New York, D. Van Nostrand Co. · leaf 373
oduced from alizarin were modified by its presence. It is now produced from coal-tar anthracene in a manner analogous to that for alizarin. /sopurpurin is a trihydroxy derivative of anthraquinone or a monoxy derivative of alizarin. It has the same empirical formula as purpurin and flavopurpurin and… … Alizarin Isopurpurin /sopurpurin is formed by melting /?-anthraquinone disulpho acid with sodium. hydroxide and potassium chlorate, /soanthro- flavic acid is formed as an intermediate product.
Coal-tar colors · Dyes and dyeing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
