Naphthol blue black is an organic sodium salt resulting from the formal condensation of Amido Black 10B (acid form) with two equivalents of sodium hydroxide.It is a dark brown granular solid.
Naphthol blue black (NBB) also called as Amido black 10B, is an textile diazo dye, with high photo- and thermal-stability.Photoelectrochemical degradation of this dye yields colorless quinone as end product