Rhodium (III) nitrate dihydrate
Rhodium(III) chloride hydrate
CAS: 20765-98-4
Molecular Formula: Cl3H6O3Rh
Rhodium (III) nitrate dihydrate - Names and Identifiers
| Name | Rhodium(III) chloride hydrate |
| Synonyms | Rhodium chloride hydrate RhodiumchloridehydrateRh RHODIUM TRICHLORIDE HYDRATE trichlororhodium trihydrate Rhodium trichloride hydrate Rhodium(III) chloride hydrate RHODIUM(III) CHLORIDE HYDRATE Rhodium(III) Chloride, hydrate Rhodium (III) nitrate dihydrate Rhodium(III) chloride trihydrate Rhodium(III) Chloride n-Hydrate rhodium(+3) cation chloride hydrate RhodiuM(III) chloride hydrate, (trace Metal basis) |
| CAS | 20765-98-4 |
| EINECS | 606-630-8 |
| InChI | InChI=1/3ClH.3H2O.Rh/h3*1H;3*1H2;/q;;;;;;+3/p-3/rCl3Rh.3H2O/c1-4(2)3;;;/h;3*1H2 |
| InChIKey | HSSMNYDDDSNUKH-UHFFFAOYSA-K |
Rhodium (III) nitrate dihydrate - Physico-chemical Properties
| Molecular Formula | Cl3H6O3Rh |
| Molar Mass | 263.31 |
| Melting Point | 100°C (dec.)(lit.) |
| Boling Point | 100℃ at 760 mmHg |
| Water Solubility | soluble |
| Solubility | Methanol (Slightly), Water (Slightly) |
| Appearance | crystalline |
| Color | White to off-white |
| Exposure Limit | ACGIH: TWA 0.01 mg/m3NIOSH: IDLH 2 mg/m3; TWA 0.001 mg/m3 |
| Merck | 14,8188 |
| Storage Condition | Store below +30°C. |
| Stability | hygroscopic |
| Sensitive | Hygroscopic |
| MDL | MFCD00149839 |
| Physical and Chemical Properties | Red-brown crystalline powder, soluble in water, hydrochloric acid, alcohol and alkali solution, insoluble in ether and aqua regia, by strong heat lost water into insoluble matter, and then decomposed into rhodium and chlorine. |
| Use | For electronics, instrumentation and other industries |
Rhodium (III) nitrate dihydrate - Risk and Safety
| Risk Codes | R22 - Harmful if swallowed R41 - Risk of serious damage to eyes |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/39 - |
| UN IDs | 1759 |
| WGK Germany | 3 |
| TSCA | Yes |
| HS Code | 28439000 |
Rhodium (III) nitrate dihydrate - Introduction
Easily soluble in water, hydrochloric acid, acetone, alcohol and alkali solution, insoluble in ether and aqua regia due to strong heat, loses crystal water and becomes insoluble, and then decomposes into rhodium and chlorine.
Last Update：2022-10-16 17:14:52
Rhodium (III) nitrate dihydrate - Reference Information
| application | hydrated rhodium trichloride can be used to prepare rhodium homogeneous organic complexation catalysts, which have the advantages of high catalytic activity and good selectivity, and have important applications in catalytic hydrogenation, olefin hydroformylation, carbonyl synthesis catalysis, and many have been used in industrial production. For example: tris (triphenylphosphine) rhodium chloride is used in industry as an efficient olefin hydrogenation catalyst, acetylacetone dicarbonyl rhodium, triphenylphosphine acetylacetone carbonyl rhodium, tris (triphenylphosphine) carbonyl rhodium, tris (m-sulfonate phenyl) phosphine] rhodium carbonyl hydride, etc. are used as efficient olefin hydroformylation catalysts in olefin hydroformylation industrial plants. Since hydrated rhodium trichloride has the advantages of good solubility and high reactivity, the above-mentioned rhodium homogeneous organic complexation catalyst is usually prepared from hydrated rhodium trichloride as raw material. |
| use | is an important chemical catalyst, used in automobile exhaust purification and pharmaceutical industry used in electronics, instrumentation and other industries cinnamaldehyde The catalyst for the reduction reaction is accompanied by the coupling reaction of arylboric acid. A catalyst for the conversion of methane to acetic acid. Catalyst for the reduction reaction of cinnamaldehyde, accompanied by the coupling reaction of arylboric acid; catalyst for the conversion of methane to acetic acid |
| Production method | 5g of sponge metal rhodium and 10.9g of potassium chloride are thoroughly mixed in a mortar, and then put into an unglazed porcelain boat. The porcelain boat is placed in the center of the reaction tube installed in the electric furnace, the temperature is controlled to 550~575 ℃, and chlorine gas washed with water is introduced into the reaction tube for 40~60min. After cooling, the dark red product was extracted with 300mL of water, and the unreacted rhodium was filtered out. Then add solid potassium hydroxide to the red filtrate at 1.1 point. When the red color disappears and yellow hydroxide precipitates [Rh2O3 · 5H2O or Rh(OH)3 · H2O] are generated, stop adding potassium hydroxide. Because the hydroxide of rhodium is amphoteric, it is not appropriate to add excessive potassium hydroxide. After leaving the precipitate overnight, it was filtered with a glass sand core funnel, and then washed with 20mL of water to remove potassium chloride and potassium hydroxide. The resulting precipitate is dissolved with as little concentrated hydrochloric acid as possible, and then the solution is evaporated on a steam bath until the smell of hydrogen chloride disappears. The resulting product is RhCl3 · 3H2O. |
| category | toxic substances |
| toxicity classification | poisoning |
| acute toxicity | oral administration-rat LD50: 1302 mg/kg; Intravenous-rat LD50: 198 mg/kg |
| flammability hazard characteristics | non-combustible; Thermal decomposition of hydrogen chloride, chlorine; Corrosive |
| storage and transportation characteristics | warehouse low temperature ventilation and drying; separate from oxidant |
| fire extinguishing agent | water |
| occupational standard | TWA 0.01 mg (rhodium)/m3; STEL 0.03 mg (rhodium)/m3 |
Last Update：2024-04-10 22:30:50
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