(Phenylazo)formic acid 2-phenylhydrazide 1,5-Diphenylcarbazone 15102-05-3 4-16-00-00017 (Beilstein Handbook Reference) 538-62-5 BRN 0959475 Diazenecarboxylic acid, phenyl-, 2-phenylhydrazide Diphenylcarbazone EINECS 208-698-0 FORMIC ACID, (PHENYLAZO)-, 2-PHENYLHYDRAZIDE Phenyldiazenecarboxylic acid 2-phenylhydrazide s-Diphenylcarbazone