S-4409 AZO Solution 18 Analytes 2783,12 4-Aminobiphenyl 1773,12 4,4’-Benzidine 2763,7 4-Chloro-2-methylaniline 1780,10 2-Aminonaphthalene 2765,6 4-Chloroaniline 278/4,7 2,4-Diaminoanisole 2762,13 4,4’-Methylenedianiline 278