Syonyms Name: C.I.Acid Black 7 (7CI,8CI); Naphthalenedisulfonic acid,1-[[4-[(4-amino-1-naphthalenyl)azo]-1-naphthalenyl]azo]-, disodium salt; AcidBlack 7; Acid Black D; Acid Black MD; Acid Leather Black M; C.I. 26300; Hispacid Black ND; Kiton Black M; Naphthale