5-Oxo-7-phenyl-4h,5h-pyrazolo[1,5-a]pyrimidine-2-carboxylic acid CAS 677720-18-2
| CAS No. | 677720-18-2 |
| Molecular Formula | C13H9N3O3 |
| Molecular Weight | 255.23 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 5-Oxo-7-phenyl-4h,5h-pyrazolo[1,5-a]pyrimidine-2-carboxylic acid (C13H9N3O3) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 11.0, corresponding to approximately 11 ring(s) or double-bond equivalent(s). With a molecular weight of 255.23 g/mol, it falls into the medium-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
5-Oxo-7-phenyl-4h,5h-pyrazolo[1,5-a]pyrimidine-2-carboxylic acid (CAS 677720-18-2), molecular formula C13H9N3O3 and molecular weight 255.23 g/mol, is a CATO reference standard with documented purity and traceability.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures 5-Oxo-7-phenyl-4h,5h-pyrazolo[1,5-a]pyrimidine-2-carboxylic acid 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.
Physical & Chemical Properties
| Molecular Formula | C13H9N3O3 |
| Molecular Weight | 255.23 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| 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 |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
| Nitrogen Atoms | 3 |
Recommended Standards
- 4'-Nitro-[1,1'-biphenyl]-3,5-dicarbaldehyde (CAS 2289758-94-5)
- 6-(4-Nitrophenyl)pyrrolo[1,2-a]pyrazin-8-ol (CAS 2034157-30-5)
- 4-Amino-1,2-dihydroxyanthracene-9,10-dione (CAS 2835-53-2)
- 6-Methyl-3-phenylpyrimido[5,4-e][1,2,4]triazine-5,7(6H,8H)-dione (CAS 42285-76-7)
- 2-(3-Chloro-4-fluorophenoxy)benzaldehyde (CAS 1393639-31-0)
- 3-(3-Cyano-4-methylphenyl)-1-cyclohexylthiourea (CAS 297149-97-4)
- 2,6-Dimethoxy-N-(3-(1-methylcyclohexyl)isoxazol-5-yl)benzamide (CAS 82558-66-5)
- Methyl 5-(dibromomethyl)picolinate (CAS 55876-83-0)
- (1-(tert-butoxycarbonyl)-4-((tert-butyldimethylsilyl)oxy)-1H-indol-2-yl)boronic acid (CAS 913388-78-0)
- Ethyl N-Boc-5-hydroxypiperidine-3-carboxylate (CAS 1272756-00-9)
- 2-(4-Bromo-phenyl)-pyrrolidine hydrochloride (CAS 1187930-57-9)
- 3-Methyl-4-(ethoxycarbonyl)phenylboronic acid (CAS 2121511-23-5)
- (2-Hydroxy-5-methyl-1H-imidazol-4-yl)(pyridin-4-yl)methanone (CAS 82709-64-6)
- Liraglutide Impurity 26 (CAS CATO-C4X-199226)
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