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Blue-black crystalline powder used as a colorimetric reagent for the detction of Zinc in metal objects, corrosion products, and pigments (Odegaard et al 2000). Zinc reacts with dithizone to produce a pink-red residue. Dithizone also reacts with Silver (violet), Copper (dark yellow), Lead (dark red), and Mercury (orange).

Chemical structure


Synonyms and Related Terms

diphenylthiocarbazone; phenyldiazenecarbothioic acid 2-phenylhydrazide


  • Contact may cause irritation.
  • Fisher Scientific: MSDS

Physical and Chemical Properties

Insoluble in water. Soluble in carbon tetrachloride, chloroform Slightly soluble in alcohols.

Composition C13H12N4S
CAS 60-10-6
Melting Point 168 C (dec)
Molecular Weight mol. wt. = 256.32

Resources and Citations

  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry #3395
  • N.Odegaard, S.Carroll, W.Zimmt, Material Characterization Tests for Objects of Art and Archaeology, Archetype Publications, London, 2000, p.96.

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