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| 融点 | 1100°C (dec.) | | 比重(密度) | 8.2 g/mL at 25 °C(lit.) | | 貯蔵温度 | under inert gas (nitrogen or Argon) at 2-8°C | | 外見 | Powder | | 色 | Yellow | | 比重 | 8.2 | | 水溶解度 | Insoluble in water, acetone, conc. Hydrochloric acid, Nitric acid, Aqua regia. | | Sensitive | Hygroscopic | | 暴露限界値 | ACGIH: TWA 1 mg/m3
NIOSH: IDLH 100 mg/m3; TWA 0.1 mg/m3 | | InChIKey | XBBXDTCPEWHXKL-UHFFFAOYSA-N | | CAS データベース | 12036-35-0(CAS DataBase Reference) | | EPAの化学物質情報 | Rhodium oxide (Rh2O3) (12036-35-0) |
| | 酸化ロジウム Usage And Synthesis |
| 外観 | 黒褐色〜黒色, 結晶〜粉末 | | 化学的特性 | Rhodium oxide is YELLOW POWDER | | 物理的性質 | Gray crystalline solid or amorphous powder; corundum-type structure; density 8.20 g/cm3; decomposes at about 1,100 to 1,150°C; insoluble in water, acids, or aqua regia.
The pentahydrate Rh2O3?5H2O is a yellow precipitate; soluble in acids; partially dissolves in hot water; ignites to form anhydrous oxide.
The trihydrate Rh2O3?3H2O is a black precipitate; insoluble in acids. | | 使用 | Use in the catalytic converters of automobiles. It is also used as an industrial catalyst in the manufacturing of chemical intermediates such as oxo-alcohols, as well as nitric acid and ethanoic (acetic) acid production. It is also an area of interest for new capacitor electrode material researchers, dynamic random access memory (DRAMs) and non volatile random access memories (FeRAMs) makers. | | 使用 | RH2o3 is used to make rhodium metal and its various salts. Also, the oxide is a catalyst for hydrogenation. | | 調製方法 | 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. | | 燃焼性と爆発性 | Not classified |
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