4-Chloro-7-ethyl-7H-imidazo[4,5-c]pyridazine CAS 1268521-56-7
| CAS No. | 1268521-56-7 |
| Molecular Formula | C7H7ClN4 |
| Molecular Weight | 182.61 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to a nitrile group, chlorine substitution, an aromatic ring system, 4-Chloro-7-ethyl-7H-imidazo[4,5-c]pyridazine is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 182.61 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
4-Chloro-7-ethyl-7H-imidazo[4,5-c]pyridazine (CAS 1268521-56-7) is a high-purity analytical reference standard with the molecular formula C7H7ClN4 and a molecular weight of 182.61 g/mol.
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.
As a certified reference material (CRM), 4-Chloro-7-ethyl-7H-imidazo[4,5-c]pyridazine 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 | C7H7ClN4 |
| Molecular Weight | 182.61 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 4 |
Related Chloro Standards
- 4-Chloro-7-methoxy-1H-indazole (CAS 1000341-90-1)
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Recommended Standards
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- 2-(Difluoromethyl)-3-methoxy-4-nitropyridine-5-methanol (CAS 1807137-76-3)
- (R)-2-(Boc-amino)propanenitrile (CAS 100927-09-1)
- Dapsone EP Impurity B (CAS 7019-01-4)
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- Insulin Degludec Impurity 19 (CAS CATO-C4X-215719)
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