14918-39-9 3,6-Bis((2,3-dihydro-1,5-dimethyl-3-oxo-2-phenyl-1H-pyrazol-4-yl)azo)-4,5-dihydroxynaphthalene-2,7-disulphonic acid Antipyrylazo III Bis(4-antipyrylazo)-4,5-dihydroxy-2,7-naphthalenedisulfonic acid EINECS 238-988-2