Synonyms: C.I. Basic Yellow 11, 1,5-naphthalenedisulfonate (2:1);3H-Indolium, 2-(2-((2,4-dimethoxyphenyl)amino)ethenyl)-1,3,3-trimethyl-, 1,5-naphthalenedisulfonate (2:1);bis(2-{(E)-2-[(2,4-dimethoxyphenyl)amino]ethenyl}-1,3,3-trimethyl-3H-indolium) naphthalene-1,7-disulfonate