7-(3-Nitrophenyl)pyrazolo[1,5-a]pyrimidine-3-carboxylic acid CAS 932236-41-4
| CAS No. | 932236-41-4 |
| Molecular Formula | C13H8N4O4 |
| Molecular Weight | 284.23 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
7-(3-Nitrophenyl)pyrazolo[1,5-a]pyrimidine-3-carboxylic acid (CAS 932236-41-4), molecular formula C13H8N4O4 and molecular weight 284.23 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 7-(3-Nitrophenyl)pyrazolo[1,5-a]pyrimidine-3-carboxylic acid (C13H8N4O4) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. 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).
As a certified reference material (CRM), 7-(3-Nitrophenyl)pyrazolo[1,5-a]pyrimidine-3-carboxylic acid 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 | C13H8N4O4 |
| Molecular Weight | 284.23 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Nitrogen Atoms | 4 |
Related Nitrophenyl Standards
- 3-(4-nitrophenyl)-3-oxo-N-phenylpropanamide (CAS 1092-69-9)
- N-(3-Nitrophenyl)-3-oxo-3-phenylpropanamide (CAS 1734-36-7)
- 2-(4-Nitrophenyl)-3a,4,7,7a-tetrahydro-1H-4,7-methanoisoindole-1,3(2H)-dione (CAS 19077-62-4)
- 1-((2-Nitrophenyl)sulfonyl)piperidin-4-one (CAS 267666-09-1)
- 1-((4-Nitrophenyl)sulfonyl)piperidin-4-one (CAS 924869-20-5)
- S-(4-Nitrophenyl)mercapturic Acid (CAS 91088-55-0)
- 1-(2-Nitrophenyl)-4-(2-pyridyl)piperazine (CAS 923789-54-2)
- 1-Methyl-2-(4-nitrophenyl)-1,2,3,4-tetrahydroquinolin-4-ol (CAS 918165-55-6)
Recommended Standards
- 5-Nitro-2-(3-nitrophenyl)-1H-benzo[d]imidazole (CAS 5969-91-5)
- 7-Amino-1,3-dimethyl-2,4-dioxo-1,2,3,4-tetrahydro-5H-pyrano[2,3-d]pyrimidine-5,5,6-tricarbonitrile (CAS 41278-83-5)
- 5-cyclobutyl-3-[4-(trifluoromethoxy)phenyl]-1,2,4-oxadiazole (CAS 680216-02-8)
- 8-Azaguanosine (CAS 2133-80-4)
- 3-{[(2-chloro-6-fluorophenyl)methyl]sulfanyl}-5-({[(2,6-dichlorophenyl)methyl]sulfanyl}methyl)-4-phenyl-4H-1,2,4-triazole (CAS 344271-21-2)
- (3,3-Difluoropyrrolidin-2-yl)methanol (CAS 1027519-80-7)
- 2,3-Dicyano-1,4-phenylene bis(trifluoromethanesulfonate) (CAS 344453-20-9)
- Roxadustat Impurity 35 (CAS 2370958-34-0)
- Ibrutinib Impurity 93 (CAS CATO-C4X-106493)
- Tert-butyl (S)-5-(1-hydroxyethyl)-3,4-dihydroquinoline-1(2H)-carboxylate (CAS 2387569-15-3)
- 4-methyl-2,3-dihydro-1H-indole-2-carboxylic acid hydrochloride (CAS 2059932-96-4)
- 6-Oxo-4-(trifluoromethyl)-N,1-bis(3-(trifluoromethyl)phenyl)-1,6-dihydropyridazine-3-carboxamide (CAS 477854-74-3)
- 2-(5-oxo-4,5-dihydro-1H-1,2,4-triazol-4-yl)acetic acid (CAS 1372557-29-3)
- Anorexigenic Peptide (CAS 69275-10-1)
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