5-chloro-3-nitro-1H-pyrazolo[4,3-b]pyridine CAS 2021203-20-1
| CAS No. | 2021203-20-1 |
| Molecular Formula | C6H11ClN4O2 |
| Molecular Weight | 206.63 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures 5-chloro-3-nitro-1H-pyrazolo[4,3-b]pyridine under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
5-chloro-3-nitro-1H-pyrazolo[4,3-b]pyridine (CAS 2021203-20-1), molecular formula C6H11ClN4O2 and molecular weight 206.63 g/mol, is a CATO reference standard with documented purity and traceability.
5-chloro-3-nitro-1H-pyrazolo[4,3-b]pyridine (C6H11ClN4O2) contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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 | C6H11ClN4O2 |
| Molecular Weight | 206.63 g/mol |
| Appearance | 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 sealed and dry, 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; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1996 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 4 |
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Recommended Standards
- 5-chloro-3-nitro-1H-pyrazolo[3,4-c]pyridine (CAS 245325-31-9)
- 5-Chloro-6-phenylpyridazin-3-ol (CAS 51660-08-3)
- 5-Chloro-2-phenylimidazole-4-carbaldehyde (CAS 60367-52-4)
- 5-Phenylfuran-2-carbonyl chloride (CAS 57489-93-7)
- 3-Bromo-6,7-diemethoxy-4-methylcoumarin (CAS 100953-77-3)
- 3,4-Dimethoxyphenethyl acetate (CAS 14617-41-5)
- 5-Chloro-2-(4-chlorophenyl)benzimidazole (CAS 69498-30-2)
- 2-{[1-(2,5-dimethylphenyl)-1H-1,2,3,4-tetrazol-5-yl]sulfanyl}acetic acid (CAS 436095-15-7)
- p-Tolyl 8-methyl-2-phenylquinoline-4-carboxylate (CAS 355421-36-2)
- Ethanol, 2,2'-[[(methyl-1H-benzotriazol-1-yl)methyl]imino]bis- (CAS 88477-37-6)
- 2-(7-Methyl-1H-indol-3-yl)-2-oxoacetyl chloride (CAS 59022-69-4)
- 5-Amino-1-(1-methylpiperidin-4-yl)pyridin-2(1h)-one (CAS 1443289-68-6)
- (2-(Bicyclo[2.2.1]Hept-5-en-2-yl)ethyl)chlorodimethylsilane (CAS 120543-78-4)
- Insulin Glargine (CAS 160337-95-1)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com