Naphthol-(1)-disulfonsaeure-(4.8), 4-Hydroxy-naphthalin-1,5-disulfonsaeure, 4-hydroxy-1,5-disulphonaphthalene, 1-naphthol-4,8-disulfonic acid, 4-hydroxynaphthalene-1,5-disulphonic acid, 1-hydroxy-naphthalene-4.8-disulfonic acid, 4-hydroxy-naphthalene-1,5-disulfonic acid, Schoellkopf's acid, schollkopf's acid(van)