SPECIFICATIONS

DITHIZONE ACS

Synonyms: 			(Phenylazo)thioformic Acid 2-Phenylhydrazide;
 				Diphenylthiocarbazone

CAS No:				60-10-6

Chemical Formula:			C6H5NHNHCSN:NC6H5

Formula Weight:			256.33

Description:				Dark purple to black crystalline powder

Assay (by spectrophotometry):	85 % minimum

Residue after ignition:		0.2% maximum

Heavy metals (as Pb):		0.002 % maximum

Ratio of absorbances:		>1.55

Effective: 06/28/10