1H-Imidazo[1,2-a]imidazole CAS 251-91-2
| CAS No. | 251-91-2 |
| Molecular Formula | C5H5N3 |
| Molecular Weight | 107.11 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
1H-Imidazo[1,2-a]imidazole (CAS 251-91-2) is a high-purity analytical reference standard with the molecular formula C5H5N3 and a molecular weight of 107.11 g/mol.
Based on its molecular formula C5H5N3, 1H-Imidazo[1,2-a]imidazole contains a nitrile group; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 107.11 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
As a certified reference material (CRM), 1H-Imidazo[1,2-a]imidazole 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.
Physical & Chemical Properties
| Molecular Formula | C5H5N3 |
| Molecular Weight | 107.11 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 3 |
Related H Standards
- 1H-Imidazo[1,2-b]pyrazole (CAS 251-80-9)
- Imidazo[4,5-c]pyrazole (CAS 251-05-8)
- Imidazo[4,5-d]imidazole (CAS 251-50-3)
- 2H-Imidazo[4,5-d][1,2,3]oxadiazole (CAS 933057-41-1)
- Imidazo[1,2-a]pyridine (CAS 274-76-0)
- 3H-Imidazo[4,5-b]pyridine (CAS 170245-18-8)
- 1H-Imidazo[4,5-b]pyridine (CAS 170245-19-9)
- 4H-Imidazo[4,5-c]pyridine (CAS 272-96-8)
Recommended Standards
- 1-(Prop-2-yn-1-yl)-1h-1,2,4-triazole (CAS 82418-39-1)
- 1-(Prop-2-yn-1-yl)-1H-1,2,3-triazole (CAS 78909-98-5)
- 1H-imidazol-2-ylacetonitrile (CAS 23184-45-4)
- 2-(4-Imidazolyl)acetonitrile (CAS 18502-05-1)
- 4-(9H-Carbazol-9-yl)aniline (CAS 52708-37-9)
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- Brevetoxin B (CAS 79580-28-2)
- 3-(((4-Chlorobenzyl)thio)methyl)-5-((2,6-dichlorobenzyl)thio)-4-phenyl-4H-1,2,4-triazole (CAS 344269-35-8)
- 1-(propan-2-yl)piperidine-3-carbaldehyde (CAS 1248558-73-7)
- Tricyclodecenyl acetate (CAS 5413-60-5)
- 59551-62-1 6382AE C12H11NO3 Ethyl (2Z)-2-cyano-3-hydroxy-3-phenylprop-2-enoate (CAS 59551-62-1)
- 2-(4-Fluoro-2-methoxyphenoxy)-2-methylpropanoic acid (CAS 952483-85-1)
- Insulin Pork(≥27 USP units/mg) (CAS 12584-58-6)
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