Dirhodiumtrioxid Chemische Eigenschaften,Einsatz,Produktion Methoden
R-Sätze Betriebsanweisung:
R36/38:Reizt die Augen und die Haut.
R8:Feuergefahr bei Berührung mit brennbaren Stoffen.
S-Sätze Betriebsanweisung:
S22:Staub nicht einatmen.
S24/25:Berührung mit den Augen und der Haut vermeiden.
S37/39:Bei der Arbeit geeignete Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S17:Von brennbaren Stoffen fernhalten.
Chemische Eigenschaften
Rhodium oxide is YELLOW POWDER
Physikalische Eigenschaften
Gray crystalline solid or amorphous powder; corundum-type structure; density 8.20 g/cm
3; decomposes at about 1,100 to 1,150°C; insoluble in water, acids, or aqua regia.
The pentahydrate Rh
2O
3?5H
2O is a yellow precipitate; soluble in acids; partially dissolves in hot water; ignites to form anhydrous oxide.
The trihydrate Rh
2O
3?3H
2O is a black precipitate; insoluble in acids.
Verwenden
RH
2o
3 is used to make rhodium metal and its various salts. Also, the oxide is a catalyst for hydrogenation.
Vorbereitung Methode
Rhodium(III) oxide, Rh2O3, can be prepared by heating the finely divided metal or its nitrate in air or O2. The rhodium(IV) oxide is also known. Rhodium trihydroxide may be precipitated as a yellow compound by adding the stoichiometric amount of KOH to a solution of RhCl3. The hydroxide is soluble in acids and excess base. When the freshly precipitated Rh(OH)3 is dissolved in HCl at a controlled pH, a yellow solution is first obtained in which the aquochloro complex of Rh behaves as a cation.
Dirhodiumtrioxid Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
