2,7-Naphthalenedisulfonic acid, 4-hydroxy-5-[(2-hydroxy-1-naphthalenyl)azo]-3-[(4-sulfo-1-naphthalenyl)azo]-, trisodium salt 3682-47-1 C.I. 26990 C.I. Acid Black 32 C.I. Acid Black 32, trisodium salt Fast Acid Black Fast Milling Black BF Fast Sulphon Black F Java Fast Black F NSC8674