161935-19-9

2,7-Naphthalenedisulfonic acid, 4-amino-6-5-4-8-amino-1-hydroxy-3,6-disulfo-7-4-2-(sulfooxy)ethylsulfonylphenylazo-2-naphthalenylazobenzoylamino-2-sulfophenylazo-5-hydroxy-3-4-2-(sulfooxy)ethylsulfonylphenylazo-, sodium salt