Dithiooxamide Chemical Properties
- Melting point:≥300 °C(lit.)
- Boiling point:287.76°C (estimate)
- Density 1.353 (estimate)
- refractive index 1.5300 (estimate)
- storage temp. Keep in dark place,Sealed in dry,Room Temperature
- solubility ethanol: soluble40mg/10 mL, clear, red
- pkapK1:10.89 (25°C)
- form solid
- Water Solubility Soluble in alcohols. Slightly soluble in water. Insoluble in ether
- Merck 14,8279
- BRN 605577
- CAS DataBase Reference79-40-3(CAS DataBase Reference)
- NIST Chemistry ReferenceEthanedithioamide(79-40-3)
- EPA Substance Registry SystemEthanedithioamide (79-40-3)
Dithiooxamide Usage And Synthesis
- Chemical Propertiesorange to brown crystalline powder
- UsesAs a reagent for copper, cobalt, and nickel. As a stabilizer of ascorbic acid solutions: Smoczkiewicz, Grochmalicka, Nature 192, 16 (1961).
- UsesRubeanic acid may be used for the quantitative precipitation of copper, nickel
and cobalt. The copper complex is dark green, the cobalt brownish-red and the
nickel violet. All these complexes are chelates of outstanding stability, and this,
together with their vivid Colours, affords the reaction great analytical sensitivity.
The copper complex is the most stable of the three; it can be precipitated even from mild mineral acidic solution, while precipitation of the corresponding cobalt and nickel complexes requires buffered media. On the other hand, palladium, platinum and silver react with rubeanic acid to give precipitates in strongly acidic solution. It should be mentioned, however, that in the case of platinum and some other metals (zinc, cadmium, silver, lead, mercury) the product is the corresponding sulfide rather than the rubeanate complex.
Rubeanic acid reacts with ruthenium to give a blue water-soluble complex ion, which is utilized for the spectrophotometric determination of ruthenium. Rubeanic acid has similarly been used for the spectrophotometric determination of osmium.
It has also proved suitable for the solvent extraction separation and determination of thallium. It has been found that thallium exists in the organic phase in the form of a complex of composition Tl/dto/Hdto, where dto represents the rubeanate anion with one negative charge.
- Safety ProfilePoison by ingestion, intraperitoneal, and intravenous routes. When heated to decomposition it emits very toxic fumes of NOx and SOx
- Purification MethodsCrystallise dithiooxamide from EtOH and sublime it at high vacuum. [Beilstein 2 IV 1871.]
Dithiooxamide Preparation Products And Raw materials
- Heavy metal capture agent Sulfamide Oxamide Thioacetamide L-Alanyl-L-Glutamine N,N'-DIBENZYL DITHIOOXAMIDE N,N'-DIDODECYL DITHIOOXAMIDE N,N'-BIS(2-HYDROXYETHYL)DITHIOOXAMIDE SPECS AN-689/12643294 N,N'-bis[3-(dimethylamino)propyl]dithiooxamide N.N'-DIBENZYLDITHIOOXAMIDE N,N'-DIMETHYLDITHIOOXAMIDE N,N'-BIS(CARBOXYMETHYL)DITHIOOXAMIDE N,N'-DICYCLOHEXYLDITHIOOXAMIDE Dithiooxamide EC 18.104.22.168
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