Phenol Phenolrot Dinatrium-3,3'-[[1,1'-biphenyl]-4,4'-diylbis(azo)]bis(4-aminonaphthalin-1-sulfonat) (4-(4-Aminophenyl)(4-iminocyclohexa-2,5-dienyliden)methyl)-2-methylanilinhydrochlorid Urease 2-(4-Dimethylaminophenylazo)benzoesaeure Natrium-4-(2,4-dihydroxyphenyl-azo)benzolsulfonat N8,N8,3-Trimethyl-2,8-phenazin-diaminmonohydrochlorid