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Dimethylglyoxime is a chemical compound described by the formula CH 3 C(NOH)C(NOH)CH 3. Its abbreviation is dmgH 2 for neutral form, and dmgH − for anionic form, where H stands for hydrogen. This colourless solid is the di oxime derivative of the di ketone butane-2,3-dione (also known as diacetyl ).
It is surrounded by two equivalents of the conjugate base (dmgH −) of dimethylglyoxime (dmgH 2). The pair of organic ligands are joined through hydrogen bonds to give a macrocyclic ligand. The complex is distinctively colored and insoluble leading to its use as a chelating agent in the gravimetric analysis of nickel.
The cobaloxime is slowly decomposed by acids and bases. With acids, the products of decomposition are dimethylglyoxime, cobalt salts, and pyridine; with bases, derivatives of other cobaloximes are formed, usually with the release of chloride ions. The complex has no reaction with hydrogen gas, and cannot carry oxygen as salcomine does.
An example SDS, including guidance for handling a hazardous substance and information on its composition and properties. A safety data sheet (SDS), [1] material safety data sheet (MSDS), or product safety data sheet (PSDS) is a document that lists information relating to occupational safety and health for the use of various substances and products.
Dimethylglyoxime (dmgH 2) is a reagent for the analysis of nickel and a popular ligand in its own right. In the typical reaction, a metal reacts with two equivalents of dmgH 2 concomitant with ionization of one proton. Salicylaldoxime is a chelator in hydrometallurgy. [20]
Suspected objects can be screened by wiping the surface with a 1% dimethylglyoxime solution that turns pink if more than 0.5 μg/cm 2 per week is released by the surface. [2] Various methods exist to test the skin or nails for nickel exposure, typically relying on wiping the skin, then quantifying the nickel on the wipe via mass spectrometry. [2]
Lev Aleksandrovich Chugaev (Russian: Лев Алекса́ндрович Чуга́ев; 16 October 1873 – 26 September 1922) was a Russian chemist.At the height of his career, he was professor of chemistry at the University of Petersburg, being the successor to Dmitri Mendeleev.
The pictogram for harmful substances of the Globally Harmonized System of Classification and Labelling of Chemicals.. The Globally Harmonized System of Classification and Labelling of Chemicals (GHS) is an internationally agreed-upon standard managed by the United Nations that was set up to replace the assortment of hazardous material classification and labelling schemes previously used around ...