5-[[4'-[[4,5-dihydro-3-methyl-5-oxo-1-(4-sulphophenyl)-1H-pyrazol-4-yl]azo][1,1'-biphenyl]-4-yl]azo]-3-methylsalicylic acid, sodium salt

5-[[4'-[[[4,5-Dihydro-3-methyl-5-oxo-1-(4-sulfophenyl)-1H-pyrazole]-4-yl]azo][1,1'-biphenyl]-4-yl]azo]-2-hydroxy-3-methylbenzoic acid/sodium,(1:x) salt