1,4-Dihydroxyanthracene-9,10-dione and ?anthracene-1,4,9,10-tetraol?and 1,2,3,4-Tetrahydronaphthalen-2-amine?condensation, stlfonation, and translated into sodium salt.
Properties and Applications
bright blue. Soluble in ethanol, insoluble in soluble fiber element. The strong sulfuric acid in light dark unto the color, diluted into deep purple.
