The same procedure can be easily applied to metal objects that regularly come in contact with the skin, for example coins, jewelry, earrings, spectacle frames, watch straps, etc. This reaction is very sensitive and can be used as a confirmation test for the presence of nickel II cations even in very low concentrations. The reaction involves two dimethylglyoxime molecules acting as chelating agents to form the nickel dymethylglyoxime square planar complex. Both qualitative and gravimetric determinations of nickel are part of many chemistry courses. This reaction is still very much in use today for the detection of nickel metal ions due to its striking colour formation. Ni 2+ (aq) + 2C 4H 8N 2O 2 (aq)→ Ni(C 4H 7N 2O 2) 2 (s) + 2H + (aq)įigure 1: Structural equation from The Gravimetric determination of Nickel, Truman State University CHEM 222 Lab Manual 3

The balanced ionic equation for this reaction: We have supplied to domestic synthetic detergent manufacturers since 2010 and exported since 2014.The chelation reaction of nickel ions with the organic bidentate ligand dimethylglyoxime (DMG) 1 in an alkaline ammonia medium producing nickel dimethylglyoxime, Ni(DMG) 2, a red cherry or raspberry colour precipitate has been known since 1905 when it was discovered by Russian chemist Lev Aleksandrovich Chugaev (see figure 1). It was the first organic spot test reagent used to detect a metal ion and as a result DMG is known as Chugaev’s reagent. We are supplying Silicate to customers from many different industries as home care products, ceramics, welding rod, mining, fertilizer, construction, water treatment, packaging, foundries.īeside main product is Silicates, we are currently the biggest Speckle manufacturer in Vietnam with a total output of 15,000 tons per, including Soda Speckles, Bentonite Speckles and Sulphate Speckles. We offer Silicate products in liquid, powder, and glass/lump form. Adjusting the ratio of Sand to Soda and Potassium Carbonate will create a wide range of different Silicate products used in many industrial and consumers products applications. Silicate is produced by the reaction of Sodium Carbonate (Soda) or Potassium Carbonate with Silica Sand at high temperature. DMG Chemical is the leading manufacturer of Silicate in Vietnam.

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