2,7-Naphthalenedisulfonicacid,4-amino-3-[2-[4-[[[4-[2-(2,4-diaminophenyl)diazenyl]phenyl]sulfonyl]amino]phenyl]diazenyl]-5-hydroxy-6-(2-phenyldiazenyl)-,sodium salt (1:2)

c.i. 30027 ; black nb ; kemacid black nbg ; acid black ba ; acid black nb-g ; acid black nbg ; c.i.acid black 234 ; lecotan black gw ; acid black 234 ; dynacid black 2n