CAS: 60-10-6 Molecular Formula: C6H5NHNHCSN=NC6H5 Molecular Weight: 256.33 g/mol Synonym(s): Diphenylthiocarbazone Test Specification Description Dark purple to black crystalline powder Assay 85% min. Residue after Ignition 0.3% max. Heavy Metals (as Pb) 0.002% max. Ratio of Absorbance ≥ 1.55