4-Cyano-1H-imidazole-5-carboxylic acid CAS 56745-98-3
| CAS No. | 56745-98-3 |
| Molecular Formula | C5H3N3O2 |
| Molecular Weight | 137.10 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 4-Cyano-1H-imidazole-5-carboxylic acid meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
4-Cyano-1H-imidazole-5-carboxylic acid (CAS 56745-98-3) is a high-purity analytical reference standard with the molecular formula C5H3N3O2 and a molecular weight of 137.10 g/mol.
Structurally, 4-Cyano-1H-imidazole-5-carboxylic acid (C5H3N3O2) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 137.10 g/mol, it falls into the low-molecular-weight range. 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.
Physical & Chemical Properties
| Molecular Formula | C5H3N3O2 |
| Molecular Weight | 137.10 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1973 |
| Nitrogen Atoms | 3 |
Related Cyano Standards
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Recommended Standards
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- 2,6-Dioxo-1,2,3,6-tetrahydropyrimidine-4-carbonitrile (CAS 79457-91-3)
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