Synonyms: Diphenaleno(1,9-ab:1',9'-lm)triphenodioxazinetetrasulfonic acid, 8,19-dichloro-, sodium salt (1:4);8,19-Dichlorotetrasulfodiphenaleno(1,9-ab:1',9'-lm)triphenodioxazine, tetrasodium salt;Diphenaleno(1,9-ab:1',9'-lm)triphenodioxazinetetrasulfonic acid, 8,19-dichloro-, tetrasodium salt;Tetrasodium 8,19-dichlorodiphenaleno(1,9-ab:1',9'-lm)triphenodioxazinetetrasulphonate