5-chloro-2H-pyrazolo[3,4-b]pyrazin-3-amine CAS 1823231-87-3
| CAS No. | 1823231-87-3 |
| Molecular Formula | C5H4ClN5 |
| Molecular Weight | 169.57 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-chloro-2H-pyrazolo[3,4-b]pyrazin-3-amine (CAS 1823231-87-3) is a high-purity analytical reference standard with the molecular formula C5H4ClN5 and a molecular weight of 169.57 g/mol.
Based on its molecular formula C5H4ClN5, 5-chloro-2H-pyrazolo[3,4-b]pyrazin-3-amine contains a nitrile group, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 169.57 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.
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 | C5H4ClN5 |
| Molecular Weight | 169.57 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 |
| CAS Registry Year (est.) | 1995 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 5 |
Related chloro Standards
- 7-chloro-1H-pyrazolo[4,3-d]pyrimidin-5-amine (CAS 1086398-36-8)
- 2-Chloro-4-methoxypyrimidine-5-carbonitrile (CAS 1106295-93-5)
- 3-Chloro-[1,2,4]triazolo[4,3-b]pyridazin-6-amine (CAS 1150888-24-6)
- 7-Chloro-3H-imidazo[4,5-b]pyridine 4-oxide (CAS 115953-98-5)
- 7-Chloro-2-methyloxazolo[5,4-d]pyrimidine (CAS 118767-93-4)
- 3-Chloro-6-(hydroxymethyl)pyrazine-2-carbonitrile (CAS 1257072-48-2)
- 7-Chloro[1,2,4]triazolo[4,3-c]pyrimidin-5-amine (CAS 1306739-68-3)
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Recommended Standards
- 4-Chlorobenzo[d]isoxazol-3(2H)-one (CAS 178748-22-6)
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- 7-Chlorobenzo[c]isoxazol-3(1H)-one (CAS 1785505-32-9)
- 4-Chloro-2-methoxypyrimidine-5-carbonitrile (CAS 1823869-53-9)
- 4-Amino-3-(4-methoxyphenyl)butanoic acid (CAS 24314-15-6)
- Lithium 2-((5-chloropyridin-2-yl)amino)-2-oxoacetate (CAS 480450-83-7)
- 1-(8-Ethoxy-2-oxo-2H-chromene-3-carbonyl)piperidine-4-carboxamide (CAS 898504-14-8)
- Methyl (2E)-3-[(2,3-dihydro-1,4-benzodioxin-6-yl)amino]-2-(4-fluorobenzenesulfonyl)prop-2-enoate (CAS 1327178-53-9)
- Methyl 3-(1H-1,2,4-triazol-3-yl)benzoate (CAS 118863-65-3)
- 3-[(3-chlorophenoxy)methyl]-4-methoxybenzaldehyde (CAS 329222-80-2)
- DL-Methionine D7 (CAS 331665-05-5)
- (R)-3-iodo-7-methyl-4,5,7,8-tetrahydro-1H-oxepino[4,5-c]pyrazole (CAS 2329573-94-4)
- 1-(3-Methoxyphenyl)cyclopropanecarbonitrile (CAS 74205-01-9)
- Insulin Degludec Impurity 2 (CAS CATO-C4X-21572)
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