5-(Pyridin-3-yl)-1H-pyrazol-3(2H)-one CAS 90280-24-3
| CAS No. | 90280-24-3 |
| Molecular Formula | C8H7N3O |
| Molecular Weight | 161.16 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 5-(Pyridin-3-yl)-1H-pyrazol-3(2H)-one (C8H7N3O) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 161.16 g/mol, it falls into the medium-molecular-weight range. 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).
CATO supplies 5-(Pyridin-3-yl)-1H-pyrazol-3(2H)-one (CAS 90280-24-3), a certified reference material (molecular formula C8H7N3O, MW 161.16 g/mol) for analytical method development and quality control.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 5-(Pyridin-3-yl)-1H-pyrazol-3(2H)-one 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 | C8H7N3O |
| Molecular Weight | 161.16 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1982 |
| Nitrogen Atoms | 3 |
Related Pyridin Standards
- 3-(Pyridin-4-yl)-1H-pyrazol-5(4H)-one (CAS 101421-76-5)
- 5-(Pyridin-2-yl)oxazol-2-amine (CAS 1014629-81-2)
- 5-(Pyridin-3-yl)oxazol-2-amine (CAS 1014629-82-3)
- 5-(Pyridin-4-yl)oxazol-2-amine (CAS 1014629-83-4)
- 5-Methyl-3-(pyridin-3-yl)-1,2,4-oxadiazole (CAS 10350-69-3)
- 1-(Pyridin-2-yl)-1h-1,2,4-triazol-5-amine (CAS 1247628-46-1)
- 1-(Pyridin-4-yl)-1h-1,2,4-triazol-3-amine (CAS 1248663-31-1)
- 1-(Pyridin-4-yl)-1h-1,2,4-triazol-5-amine (CAS 1250282-04-2)
Recommended Standards
- 5-(Pyridazin-4-yl)-1H-pyrazol-3-amine (CAS 2763703-89-3)
- 5-(Pyridin-3-yl)-4h-1,2,4-triazol-3-amine (CAS 35607-27-3)
- 5-(1H-Imidazol-4-yl)pyrimidin-4-amine (CAS 840529-39-7)
- 5-Acetyl-2-hydroxybenzonitrile (CAS 39055-82-8)
- N-methyl-1-(1-phenylpyrrolidin-3-yl)methanamine (CAS 915921-18-5)
- Epitigogenin (CAS 6788-40-5)
- 1-(5-Bromo-4-chloropyridin-2-yl)ethan-1-one (CAS 1256789-44-2)
- 2-(Adamantan-2-ylidene)acetic acid (CAS 25220-07-9)
- Azelnidipine Impurity 8 (CAS CATO-C4X-10408)
- N-(2,4-Dimethylphenyl)-3-methylbenzofuran-2-carboxamide (CAS 55990-33-5)
- Ketorolac Impurity 42 (CAS 144710-35-0)
- 8-Chloro-4-methoxy-2-naphthoic acid (CAS 91498-80-5)
- Ethyl 4-(3,4-dimethoxyphenyl)-2-oxo-2,3-dihydrothiazole-5-carboxylate (CAS 886497-86-5)
- Semaglutide impurity 22(OtBu-Ste-γGlu(OtBu)-AEEA-AEEA-OH) (CAS 1118767-16-0)
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