directscarlet DIAMINE SCARLET B CHLORAMINE RED B DIRECT SCARLET B AMIDINE SCARLET B disodium 8-[[4'-[(4-ethoxyphenyl)azo][1,1'-biphenyl]-4-yl]azo]-7-hydroxynaphthalene-1,3-disulphonate Diamine Scarlet BA-CF Direct Fast Scarlet B