sodium 2-[3-[4'-(3-cyanotriazen-1-yl)-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]-1-methyltriazen-2-yl]ethanesulphonate

2-[3-[4'-(3-Cyano-1-triazenyl)-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]-1-methyl-2-triazenyl]ethanesulfonic acid sodium salt