Syonyms Name: 15630:1; C.I. Pigment Red 49, barium salt (2:1); Barium lithol red; 2-(2-Hydroxy-1-naphthylazo)-1-naphthalenesulfonic acid barium salt (2:1); Barium bis[2-(2-hydroxy-1-naphthylazo)-1-naphthalenesulfonate]; D & C Red No.12; Lithol Red BA; Pigment Red 49(Ba