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Basic information
- CAS
12036-35-0- Standard SMILES
[O-2].[O-2].[O-2].[Rh+3].[Rh+3]- InChIKey
XBBXDTCPEWHXKL-UHFFFAOYSA-N- Molecular formula
- O3Rh2
- Average molar mass
- 253.809 g/mol
- Monoisotopic mass
- 253.79573
Names & identifiers
- Preferred name
- Rhodium oxide
- IUPAC
- tris(oxygen(2-));bis(rhodium(3+))
- English name
- Rhodium oxide
- Molecular formula
- H2ORh
- Molecular weight
- 120.92
Names & synonyms
Rhodium(III) oxideDirhodium trioxideRhodium oxide (Rh2O3)6PYI3777JIRHODIUM SESQUIOXIDEDIRHODIUM TRIOXIDE CDTXSID80276468EINECS 234-846-9RefChem:883013Rhodium(III) oxide, anhydrousDTXCID0022775012036-35-0
Show more names
Rhodium trioxideRHODIUM(+3)OXIDEHodium trihydroxideRHODIUM OXIDE ANDYDROUSRHODIUM(III) OXIDE, 99.8%
Rhodium oxideoxygen(2-);rhodium(3+)UNII-6PYI3777JISCHEMBL38885Rhodium(3+) oxide (2/3)XBBXDTCPEWHXKL-UHFFFAOYSA-NRhodium Oxide Nanoparticle DispersionAKOS016010287
Database identifiers
- CAS
12036-35-0- PubChem CID
- 159409
- DTXSID
DTXSID80276468- UNII
- 6PYI3777JI
- EC Number
- 234-846-9
Properties
Computed structural propertiesFilling in
- Topological polar surface area
- 3 Ų
- Hydrogen bond donors
- 0
- Hydrogen bond acceptors
- 3
- Rotatable bonds
- 0
- Heavy atoms
- 5
- Formal charge
- 0
- Complexity
- 0
Physicochemical properties
- Melting point
- 1100 °C · 1100°C (dec.)
- Density
- 8.2 g/mL · 8.2 g/mL at 25 °C(lit.)
- storage temp.
- 2 · under inert gas (nitrogen or Argon) at 2-8°C
- form
- Powder
- color
- Yellow
- Specific Gravity
- 8.2 · 8.2
- Water Solubility
- Insoluble in water, acetone, conc. Hydrochloric acid, Nitric acid, Aqua regia.
- Specific Heat Capacity
- 0.86 J/ · Cp(crystal): 0.86 J/(g·K), at 25℃
- Sensitive
- Hygroscopic
- Crystal Structure
- Corundum type
- crystal system
- Three sides
- Space group
- 3 c · R3c
- Lattice constant
- a/nm
- Symbol(GHS)
- 7 · GHS07
- Signal word
- Warning
- Hazard statements
- 302 · H302-H319-H312-H315-H335-H332-H271
Safety & regulation
Safety information is for reference only and does not replace the supplier’s Safety Data Sheet (SDS), applicable regulations, or professional assessment.
Safety data
- PPE
- Eyeshields, Gloves, type N95 (US)
- wgk
- 3
- tsca
- TSCA listed
- ridadr
- 3288
- hs_code
- 28259085
- risk_code
- 36/38-8
- Signal word
- Warning
- Symbol(GHS)
- GHS07
- hazard_code
- O;Xi,Xi,O
- safety_code
- 22-24/25-37/39-26-17
- hazard_class
- 6.1(b)
- Storage Class
- 11 - Combustible Solids
- packing_group
- III
- Hazard statements
- H302-H319-H312-H315-H335-H332-H271
- REACH Registrations
- Active
- Precautionary statements
- P261-P271-P304+P340-P312-P210-P220-P221-P280-P283-P306+P360-P371+P380+P375-P370+P378-P501-P264-P270-P301+P312-P330-P501-P264-P280-P305+P351+P338-P337+P313P-P280-P302+P352-P312-P322-P363-P501-P264-P280-P302+P352-P321-P332+P313-P362
Chemistry & industry
Applications
UsesRh2O3 is used to make rhodium metal and its various salts. Also, the oxide is a catalyst for hydrogenation.
UsesRH2o3 is used to make rhodium metal and its various salts. Also, the oxide is a catalyst for hydrogenation.
UsesUse 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.
Preparation methods
PreparationRhodium sesquioxide is obtained by heating rhodium metal to red heat in air. 4Rh + 3O2 → 2Rh2O3 Alternatively, Rh2O3 may be prepared by igniting rhodium nitrate, Rh(NO3)3. Treating the sesquioxide with alkali first forms a yellow precipitate of pentahydrate, Rh2O3•5H2O, soluble in acid and excess alkali. In excess alkali a black precipitate of trihydrate, Rh2O3•3H2O is obtained. The trihydrate is insoluble in acids.
Upstream & downstream products
Upstream raw materials
Suppliers93 total
Related reactions
0 records
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Compound notes
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