mononatrij voda-[5-[[2,4-dihidroksi-5-[(2-hidroksi-3,5-dinitrofenil)azo]fenil]azo]-2-naftalensulfonat], željezov kompleks
reaktionsblandning av: 3-cyano-5-(2-cyano-4-nitrofenylazo)-2-(2-hydroxietylamino)-4-metyl-6-[3-(2-fenoxietoxi)propylamino]pyridin; 3-cyano-5-(2-cyano-4-nitrofenylazo)-6-(2-hydroxietylamino)-4-metyl-2-[3-(2-fenoxietoxi)propylamino]pyridin;