Quinoxalino[2,3-b]phenoxazinium, 3,9-bis(dimethylamino)-7-phenyl-, chloride (1:2)

N,N-dimethyl-4-nitrosobenzenamine hydrochloride (2 Moore) and 3-(Phenylamino)phenol?(1 Moore) condensation.

black. Soluble in water for violet black, soluble in ethanol for blu-ray black. The strong sulfuric acid for black, diluted for blue purple, precipitation. The dye solution to join sodium hydroxide have violet black precipitation.