5,7-dichloro-1-methyl-1H-pyrazolo[4,3-b]pyridine CAS 1803608-25-4
| CAS No. | 1803608-25-4 |
| Molecular Formula | C7H5Cl2N3 |
| Molecular Weight | 202.04 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 202.04 g/mol gives 5,7-dichloro-1-methyl-1H-pyrazolo[4,3-b]pyridine distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
5,7-dichloro-1-methyl-1H-pyrazolo[4,3-b]pyridine (CAS 1803608-25-4), molecular formula C7H5Cl2N3 and molecular weight 202.04 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 5,7-dichloro-1-methyl-1H-pyrazolo[4,3-b]pyridine (C7H5Cl2N3) is characterized by a nitrile group, chlorine substitution, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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.
Physical & Chemical Properties
| Molecular Formula | C7H5Cl2N3 |
| Molecular Weight | 202.04 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| 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.) | 1995 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related dichloro Standards
- 2,4-Dichloro-5-methyl-7H-pyrrolo[2,3-d]pyrimidine (CAS 1060815-86-2)
- 5,6-dichloro-2,3-dihydro-1H-isoindol-1-one (CAS 110568-67-7)
- 3,5-Dichloro-1H-indazol-6-amine (CAS 1167055-44-8)
- 2,5-Dichloro-7-methylbenzo[d]oxazole (CAS 1181245-77-1)
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Recommended Standards
- 4,6-Dichloropyrido[3,4-d]pyrimidine (CAS 171178-48-6)
- 2-Chloro-5-(chloromethyl)benzo[d]oxazole (CAS 1803740-66-0)
- 5,6-Dichloro-1-methyl-1H-pyrazolo[3,4-b]pyridine (CAS 1707610-10-3)
- 2-Chloro-6-(chloromethyl)benzo[d]oxazole (CAS 1803794-73-1)
- 2-Methoxy-N-(5-methylisoxazol-3-yl)acetamide (CAS 86487-47-0)
- (1-methylazetidin-3-yl)methanol (CAS 1499172-23-4)
- 1-(Oxolan-2-yl)ethan-1-amine hydrochloride (CAS 1401425-31-7)
- 5-((4-(Tert-butyl)phenyl)thio)-1-methyl-3-phenyl-1H-pyrazole-4-carbaldehyde (CAS 321998-18-9)
- (R)-2-(tert-butoxycarbonyl)-2,8-diazaspiro[4.5]Decane-3-carboxylic acid (CAS 2306253-96-1)
- 1-(2,4-Dihydroxyphenyl)-1-butanone (CAS 4390-92-5)
- N-(1-(pyridin-2-yl)ethyl)hexan-1-amine (CAS 114366-08-4)
- (2-Chlorophenyl)(4-(4-chlorophenyl)piperazin-1-yl)methanone (CAS 420093-67-0)
- 2-(1H-Imidazol-5-yl)ethane-1-thiol (CAS 20979-12-8)
- Biotinyl-CBP501 Affinity Peptide trifluoroacetate salt (CAS 2022956-39-2)
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