4-Oxo-4,5-dihydro-1H-imidazole-2-sulfonic acid CAS 858511-41-8
| CAS No. | 858511-41-8 |
| Molecular Formula | C3H4N2O4S |
| Molecular Weight | 164.14 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
4-Oxo-4,5-dihydro-1H-imidazole-2-sulfonic acid (CAS 858511-41-8), molecular formula C3H4N2O4S and molecular weight 164.14 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 4-Oxo-4,5-dihydro-1H-imidazole-2-sulfonic acid (C3H4N2O4S) contains an amide group, a sulfone group, a carboxylic acid group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 3.0, corresponding to approximately 3 ring(s) or double-bond equivalent(s). With a molecular weight of 164.14 g/mol, it falls into the medium-molecular-weight range. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
Physical & Chemical Properties
| Molecular Formula | C3H4N2O4S |
| Molecular Weight | 164.14 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1987 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Oxo Standards
- 6-Ethyl-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one (CAS 101861-10-3)
- 6,7-Dihydro-5H-cyclopenta[d]pyrimidine-4-carboxylic acid (CAS 1083396-50-2)
- 6,7-Dihydro-5H-pyrrolo[3,4-d]pyrimidine-2-carboxamide (CAS 1170220-56-0)
- 2,3-Dihydro-1H-pyrrolo[3,2-b]pyridine-6-carboxylic acid (CAS 1194796-77-4)
- 2-(6,7-Dihydro-5H-pyrrolo[2,1-c][1,2,4]triazol-3-yl)-2-hydroxyacetonitrile (CAS 1330752-79-8)
- 3,4-Dihydro-6-hydroxyquinoxalin-2(1H)-one (CAS 1378683-92-1)
- 2,3-Dihydro-1H-pyrrolo[2,3-b]pyridine-4-carboxylic acid (CAS 1529055-75-1)
- 2,3-Dihydro-1H-pyrrolo[3,2-b]pyridine-5-carboxylic acid (CAS 1548017-53-3)
Recommended Standards
- 4-Fluoro-1H-pyrrolo[2,3-c]pyridine-7-carbaldehyde (CAS 446284-46-4)
- 5-(2,6-Dichlorophenyl)-1H-tetrazole (CAS 50907-31-8)
- 4-Fluoro-1H-pyrrolo[2,3-c]pyridine-2-carbaldehyde (CAS 2231675-00-4)
- 5-(2-Fluorophenyl)tetrazole (CAS 50907-19-2)
- 6-Ethyl-N2,N2-dimethyl-3,6-dihydro-1,3,5-triazine-2,4-diamine (CAS 791577-20-3)
- ethyl 3-amino-5-phenyl-1H-pyrrole-2-carboxylate (CAS 237435-27-7)
- STF-62247 (CAS 315702-99-9)
- Methyl 3-(4-chloro-3-methyl-1h-pyrazol-1-yl)-2-(methylamino)propanoate (CAS 1339621-56-5)
- 2-Amino-4-(4-iodo-1h-pyrazol-1-yl)-2-methylbutanamide (CAS 1341404-87-2)
- 5-Amino-2-methyl-2-pentanol (CAS 108262-66-4)
- (9H-Fluoren-9-yl)methyl (2-((2-hydroxyethyl)amino)ethyl)carbamate (CAS 2389064-36-0)
- 2-Chloro-5H-pyrrolo[3,2-d]pyrimidine-7-carbonitrile (CAS 1824287-31-1)
- Boc-Tyr(3,5-I2)-OSu (CAS 163679-35-4)
- Insulin Degludec Impurity 3 (CAS CATO-C4X-21573)
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