Diphenylcarbazone is an orange solid that dissolves well in Ethanol, Chloroform and Benzene and is almost insoluble in water.

Certain commercial products of diphenylcarbazone are a mixture with Diphenylcarbazide, which also forms colored complex compounds with certain metal ions.

Diphenylcarbazone is used as an indicator for endpoint determination in mercurimetry: If a Sodium chloride solution is titrated with Mercury(II) nitrate solution, undissociated Mercury(II) chloride is formed.

If the end point is exceeded, then the color complex forms with diphenylcarbazone.

If you add a certain amount of mercury(II) nitrate solution in excess to a chloride solution, you can determine the color intensity of the complex photometrically and thus deduce the chloride content.