2-Anthracenesulfonic acid, aminobromo-9,10-dihydro[(4-methyl-2-sulfophenyl)amino]-9,10-dioxo-, sodium salt (1:2)

Preparation

1-Amino-2,4-dibromoanthracene-9,10-dione and p-Methylaniline condensation, then use 100% sulfuric Acid and sodium salt into products, then its product (C.I. Acid Blue 78, C.I. 62105) with hair smoke sulfuric Acid in the presence of boric Acid in stlfonation, generate two horizontal Acid, and translate into sodium salt.

Properties and Applications

dark blue. Soluble in alcohol. In the dark for the strong sulfuric acid, diluted to blue.