Synonyms: Benzamide,N,N'-(5,10,15,17-tetrahydroxy-16H-dinaphtho[2,3-a:2',3'-i]carbazole-4,9-diyl)bis-,tetrakis(hydrogen sulfate) (ester), tetrasodium salt (8CI);16H-Dinaphtho[2,3-a:2',3'-i]carbazole, benzamide deriv.; Ahcovat Soluble BrownIR; C.I. 69016; C.I. Solubilised Vat Brown 3, tetrasodium salt; Soledon BrownIR; Soledon Brown R