2-Naphthalenesulfonic acid, 5(or 8)-amino-8(or 5)-[(4-hydroxyphenyl)amino]-, reaction products with sodium sulfide (Na2(Sx));Sulphur Blue 15;Sulfur blue 15 (C.I. 53540);Sapphire blue CV;C.I.53540;Immedial Green Blue CV;Mitsui Sulphur Green CV;Calcogene Electric Blue CF