How is the structure of nickel DMG

Structural formula
Surname Dimethyl glyoxime
other names
  • Diacetyl dioxime
  • Diacetyl glyoxime
  • 2,3-butanedione dioxime
Molecular formula C.4H8N2O2
CAS number 95-45-4
Brief description colorless, odorless powder
Molar mass 116.119 g mol−1
Physical state firmly
Melting point 240-241 ° C
  • soluble in alcohol, acetone, ether, and pyridine
  • almost insoluble in water (0.6 g l−1 at 20 ° C)
safety instructions
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions.

Diacetyl dioxime or Dimethylglyoxime (Abbreviation: DADO) is an organic-chemical complexing agent.


Diacetyldioxime is a complexing agent that forms colored chelate complexes with heavy metals such as Ni, Fe, Bi, Co, Cu, Pb, Pt, Pd and Re salts.

In particular, the raspberry-red nickel diacetyl dioxime complex in alkaline solution serves as qualitative evidence and is used for quantitative determination (photometry) for nickel salts. The color can still be diluted up to 1:106 be recognized. Interfering ions can be masked with citric acid in an alkaline solution.

The following colorations / precipitates form in ammoniacal solutions:

  • Nickel: raspberry red
  • Copper: brownish red
  • Iron (III): red
  • Cobalt: brownish red
  • Bismuth: intense yellow
  • Lead: white (voluminous, finely divided)
  • Palladium: yellow-yellowish


  • Saturated solution of dimethylglyoxime in 96% ethanol
  • Aqueous solution with 0.1 mol / l disodium bis (dimethylglyoximate)


  1. abc Entry to Dimethylglyoxime in the GESTIS substance database of the BGIA, accessed on Sep 1. 2007 (JavaScript required)

Category: Oxime