Jump to navigation Jump to search


Transparent triclinic crystals used in a colorimetric reagent to detect trace amounts of Nickel, Copper, Cobalt, or Bismuth (Odegaard et al 2000). Dimethylglyoxime reacts with soluble nickel to produce a bright red precipitate. Copper produces a blue precipitate, cobalt gives a brown, and bismuth forms a bright yellow.

Chemical structure


Synonyms and Related Terms

2,3-butanedionedioxime; 2,3-diisonitrosobutane; diacetyldioxime


  • Harmful by ingestion.
  • Contact may cause irritation.
  • Fisher Scientific; SDS

Physical and Chemical Properties

Insoluble in water. Soluble in alcohol, ether, pyridine, acetone.

Solution (0.01N): Dissolve 0.6 g dimethylglyoxime in 500 ml of 95% ethyl alcohol.

Composition C4H8N2O2
CAS 95-45-4
Melting Point 238-240 C
Molecular Weight mol. wt. = 116.12

Resources and Citations

  • The Merck Index, Susan Budavari (ed.), Merck Research Labs, Whitehouse Station, NJ, 12th Edition, 1996 Comment: entry 3240
  • N.Odegaard, S.Carroll, W.Zimmt, Material Characterization Tests for Objects of Art and Archaeology, Archetype Publications, London, 2000, p.80.
  • CRC Handbook of Chemistry and Physics, Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980 Comment: Solution (0.01N): Dissolve 0.6 g dimethylglyoxime in 500 ml of 95% ethyl alcohol.
  • Sigma Dyes, Stains and Natural Pigments, Infrared Library, Nicolet, 1991-1995 Comment: OMNIC: formula= C4H8N2O2, CAS= 95-45-4