Dithizone

Description

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

Risks

• 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.