Acid Black D
Acid Black 7
C.I.Acid Black 7
Naphthalene Black D
C.I.26300Acid Black 7
C.I.Acid Black 7:C.I.26300
4-[[4-[(4-Amino-1-naphthalenyl)azo]-1-naphthalenyl]azo]-2,？-naphthalenedisulfonic acid disodium salt
4-Amino-2,6-naphthalenedisulfonic acid?and 4-Aminonaphthalene-2,7-disulfonic acid diazo, and Naphthalen-1-amine coupling, its product to diazo, and Naphthalen-1-amine coupling.
Properties and Applications
black. Soluble in water and ethanol is a deep red. The strong sulfuric acid in blue or black for ash, after diluted red purple precipitation. In water solution to join strong hydrochloric acid is a deep red; Add thick sodium hydroxide solution for deep red.
