Title: Diphenylcarbazone
CAS Registry Number: 538-62-5
CAS Name: Phenyldiazenecarboxylic acid 2-phenylhydrazide
Molecular Formula: C13H12N4O
Molecular Weight: 240.26
Percent Composition: C 64.99%, H 5.03%, N 23.32%, O 6.66%
Line Formula: C6H5N=NCONHNHC6H5
Properties: Orange-red needles. mp about 157° with decompn. Insol in water. Sol in alcohol, chloroform, benzene.
Melting point: mp about 157° with decompn
Use: As a sensitive reagent for Hg, with which it gives a blue color.

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