Pyrazolo[1,5-α]pyrimidin-7(1H)-one CAS 57489-79-9
| CAS No. | 57489-79-9 |
| Molecular Formula | C6H5N3O |
| Molecular Weight | 135.12 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Pyrazolo[1,5-α]pyrimidin-7(1H)-one (CAS 57489-79-9), a certified reference material (molecular formula C6H5N3O, MW 135.12 g/mol) for analytical method development and quality control.
The molecular framework of Pyrazolo[1,5-α]pyrimidin-7(1H)-one (C6H5N3O) is characterized by an amide group, a hydroxyl group, an ether linkage, 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 aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
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 | C6H5N3O |
| Molecular Weight | 135.12 g/mol |
| 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1973 |
| Nitrogen Atoms | 3 |
Related Pyrazolo Standards
- Pyrazolo[1,5-a]pyrimidin-5(1H)-one (CAS 1027534-43-5)
- pyrazolo[1,5-a]pyrimidin-6-ol (CAS 1580489-59-3)
- 1H-Pyrazolo[3,4-b]pyridin-1-ol (CAS 159487-16-8)
- 1H-Pyrazolo[3,4-b]pyridine 7-oxide (CAS 924909-11-5)
- 1H-Pyrazolo[3,4-c]pyridin-3(2H)-one, 97% (CAS 53975-70-5)
- 1H-Pyrazolo[4,3-b]pyridin-3(2H)-one (CAS 51617-92-6)
- 1H-Pyrazolo[4,3-b]pyridin-7(4H)-one (CAS 94220-42-5)
- 1H-Pyrazolo[4,3-c]pyridine 5-oxide (CAS 871836-50-9)
Recommended Standards
- Pyrazolo[1,5-a]pyrimidin-7(4H)-one (CAS 29274-23-5)
- Pyridine-2,3-dicarbaldehyde (CAS 4663-93-8)
- Pyrazolo[1,5-a]pyrimidin-7(1H)-one (CAS 791013-31-5)
- Pyridine-2,4-dicarbaldehyde (CAS 6220-65-1)
- 2-(Pyridin-2-yl)pyrazolo[1,5-a]pyrazin-4-ol (CAS 1351800-32-2)
- 2-((4-Allyl-5-(4-(tert-butyl)phenyl)-4H-1,2,4-triazol-3-yl)thio)-N-(4-bromophenyl)acetamide (CAS 539812-51-6)
- 2-((3-Cyano-6-methyl-5,6,7,8-tetrahydro-1,6-naphthyridin-2-yl)thio)-N-(4-(trifluoromethoxy)phenyl)acetamide (CAS 445382-44-5)
- Mosapride Impurity 22 (CAS CATO-C4X-104422)
- 4-Methyl-1H-indole-2-carbonitrile (CAS 1541530-91-9)
- Benzyl 2-bromo-2-methylpropanoate (CAS 75107-16-3)
- 3-Ethoxy-4-iodobenzaldehyde (CAS 916344-27-9)
- Ethanol, 2-[(4-methoxyphenyl)thio]- (CAS 13290-19-2)
- 2-(Difluoromethyl)-6-hydroxy-3-iodo-5-nitropyridine (CAS 1805197-20-9)
- [D-Glu]3-Semaglutide (CAS CATO-C4X-2226253)
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