4-Chloro-2,3-dihydro-1H-pyrrolo[2,3-d]pyridazine CAS 1354455-05-2
| CAS No. | 1354455-05-2 |
| Molecular Formula | C6H6ClN3 |
| Molecular Weight | 155.58 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
4-Chloro-2,3-dihydro-1H-pyrrolo[2,3-d]pyridazine (CAS 1354455-05-2), molecular formula C6H6ClN3 and molecular weight 155.58 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a nitrile group, chlorine substitution, an aromatic ring system, 4-Chloro-2,3-dihydro-1H-pyrrolo[2,3-d]pyridazine is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 155.58 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
As a certified reference material (CRM), 4-Chloro-2,3-dihydro-1H-pyrrolo[2,3-d]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 | C6H6ClN3 |
| Molecular Weight | 155.58 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1991 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related Chloro Standards
- 3-(4-Chloro-1h-pyrazol-1-yl)propanenitrile (CAS 1001500-05-5)
- 4-Chloro-5-methylpicolinaldehyde (CAS 1060801-47-9)
- 2-Chloro-5-methylisonicotinaldehyde (CAS 1060801-49-1)
- 4-Chloro-5-methylnicotinaldehyde (CAS 1060801-51-5)
- 6-Chloro-4-methylpicolinaldehyde (CAS 1060804-70-7)
- 4-Chloro-6-methylnicotinaldehyde (CAS 1060805-86-8)
- 4-Chloro-2-methylnicotinaldehyde (CAS 1060805-88-0)
- 3-Chloro-6-methylpicolinaldehyde (CAS 1060810-01-6)
Recommended Standards
- 3-Chloro-6,7-dihydro-5H-pyrrolo[3,4-c]pyridazine (CAS 1341035-79-7)
- 5-Chloro-6-methylpicolinaldehyde (CAS 137778-17-7)
- 2-(2-Chloropyridin-3-yl)acetaldehyde (CAS 1335054-88-0)
- N-(3-chlorophenyl)formamide (CAS 139-71-9)
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- 4,4,4-Trifluorobutane-1,3-diol (CAS 433-25-0)
- 5-Hydroxy-4-(5-(pyrrolidin-1-ylmethyl)thiophen-2-yl)isoquinolin-1(2H)-one (CAS 651030-26-1)
- tert-Butyl 3-(2-methoxyethyl carbonyl)piperidine-1-carboxylate (CAS 1016509-34-4)
- 1-Cyclohexyl-3-[[2-(4-methylphenyl)sulfonylacetyl]amino]thiourea (CAS 1023562-12-0)
- 1-(tert-Butyl) 2-methyl 4-bromo-1H-pyrrole-1,2-dicarboxylate (CAS 156237-78-4)
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