Ammonium rhodium(III) sulfate CAS 68156-19-4
| CAS No. | 68156-19-4 |
| Molecular Formula | Rh |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 218.01 g/mol gives Ammonium rhodium(III) sulfate distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Ammonium rhodium(III) sulfate (CAS 68156-19-4), molecular formula RhH2O4SH3N and molecular weight 218.01 g/mol, is a CATO reference standard with documented purity and traceability.
Ammonium rhodium(III) sulfate (RhH2O4SH3N) contains a sulfone group. It is notably hygroscopic; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | Rh H2O4S H3N |
| Molecular Weight | 218.01 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Freely soluble in water |
| Stability | Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| CAS Registry Year (est.) | 1976 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Ammonium Standards
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- Rhodium(III) sulfate solution (CAS 10489-46-0)
- Rhodium(1+), [(1,2,5,6-η)-1,5-cyclooctadiene](N,N,N′,N′-tetramethyl-1,2-ethanediamine-κN,κN′)- (dichloro[(1,2,5,6-η)-1,5-cyclooctadiene]rhodate(1-)) (CAS 108559-48-4)
- Rhodium(1+), [N,N'-bis(2-aminoethyl)-1,2-ethanediamine-N,N',N'',N''']dichloro-, chloride (CAS 110556-98-4)
- Rhodium(III) bromide trihydrate (CAS 1151980-86-7)
- Rhodium(III) oxide (CAS 12036-35-0)
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