5873-16-5 61332-27-2 9-(2,4-Disulfophenyl)-3,6-bis(ethylamino)-2,7-dimethylxanthylium, hydroxide, inner salt, monosodium salt Acid red 50 CI 45220 EINECS 227-528-6 Hydrogen 9-(2,4-disulphonatophenyl)-3,6-bis(ethylamino)-2,7-dimethylxanthylium, monosodium salt Xanthylium, 9-(2,4-disulfophenyl)-3,6-bis(ethylamino)-2,7-dimethyl-, hydroxide, inner salt, monosodium salt Xanthylium, 9-(2,4-disulfophenyl)-3,6-bis(ethylamino)-2,7-dimethyl-, inner salt, monosodium salt