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It is a dark red product, insoluble in water, quite soluble in methyl alcohol, ethyl alcohol, and acetone, giving purple solutions, but slightly soluble in ether and benzene. Calc. for C~Hs04Fe: Fe, 19.05. Found: 19.8. The cobalt and chromium salts of alizarine as well as the copper and nickel salts of anthrapurpurine and flavopurpurine were prepared and, with the exception of the cobalt salt of alizarine, which analyzed for C~H2101L!o, appear to be normal salts. summary. Copper, cadmium,doi:10.1021/ja02233a026 fatcat:ft2ahkmzuzejvf7ksvnpw2zk7u