ACID BLACK 32; C.I.Acid Black 32; FAST SULFONE BLACK F; FAST SULPHON BLACK F; CI 26990; trisodium 4-hydroxy-5-[(2-hydroxynaphthyl)azo]-3-[(4-sulphonatonaphthyl)azo]naphthalene-2,7-disulphonate; 2,7-Naphthalenedisulfonic acid, 4-hydroxy-5-(2-hydroxy-1-naphthalenyl)azo-3-(4-sulfo-1-naphthalenyl)azo-, trisodium salt
