Dithiooxamid

Gefahreninformationscode (GHS)

• Bildanzeige (GHS)

  

• Alarmwort

  Warnung

• Gefahrenhinweise

  H302：Gesundheitsschädlich bei Verschlucken.

Dithiooxamide Chemische Eigenschaften,Einsatz,Produktion Methoden

• R-Sätze Betriebsanweisung:

  R22:Gesundheitsschädlich beim Verschlucken.
  R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.

• S-Sätze Betriebsanweisung:

  S36/37:Bei der Arbeit geeignete Schutzhandschuhe und Schutzkleidung tragen.

• Chemische Eigenschaften

  orange to brown crystalline powder

• Verwenden

  As a reagent for copper, cobalt, and nickel. As a stabilizer of ascorbic acid solutions: Smoczkiewicz, Grochmalicka, Nature 192, 16 (1961).

• Verwenden

  Rubeanic 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.

• Verwenden

  Dithiooxamide acts as a chelating agent and used in the determination of copper(II), nickel(II) and cobalt(II). It is used as a building block in the synthesis of cyclen. It is involved in the preparation of thiazolothiazole-linked porous organic polymers and N,N'-disubstituted dithiooxamides. It is also employed as a modifier to prepare the modified glassy carbon electrode which is used to investigate the electrochemical properties of quercetin, an important flavonoid derivative. Further, it is involved in the preparation of chelating resin with formaldehyde, which finds application in separation and concentration of silver ions.

• Allgemeine Beschreibung

  Dithiooxamide is reported to form complexes with Ni(II).

• Sicherheitsprofil

  Poison by ingestion, intraperitoneal, and intravenous routes. When heated to decomposition it emits very toxic fumes of NOx and SOx

• Synthese

  Add concentrated ammonia to the concentrated copper sulfate solution while stirring until the precipitated copper hydroxide is redissolved. After cooling, a solution of potassium cyanide is added slowly with constant stirring until the blue color disappears. Then hydrogen sulfide gas made by the reaction of sodium sulfide and hydrochloric acid is passed into the reaction solution. Control hydrogen sulfide: cyanide gas = 3:1, stir well and then cool thoroughly, leave to stand, filter. The resulting crystals were washed with cold water and recrystallized from ethanol to obtain the finished product dithiooxalylamine.

• läuterung methode

  Crystallise dithiooxamide from EtOH and sublime it at high vacuum. [Beilstein 2 IV 1871.]

Dithiooxamide Upstream-Materialien And Downstream Produkte

Dithiooxamid Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

Global(288)Suppliers

79-40-3, Dithiooxamide Verwandte Suche: