2,7-Naphthalenedisulfonic acid, 4-amino-3-[[4'-[(4-amino-2-hydroxyphenyl)azo]-3,3'-dimethyl[1,1'-biphen yl]-4-yl]azo]-5-hydroxy-6-(phenylazo)-, disodium salt

CAS:137320-82-2

Formula:C36H30N8O8S2.2Na