2-[4-[[4-[[4-[(2-cyanoethyl)ethylamino]phenyl]azo]-2-methylphenyl]azo]phenoxy]ethyl sodium sulphate

Sulfuric acid sodium 2-[p-[4-[p-[N-(2-cyanoethyl)-N-ethylamino]phenylazo]-2-methylphenylazo]phenoxy]ethyl ester salt