7-Oxo-4,7-dihydropyrazolo[1,5-a]pyrimidine-3-carbonitrile CAS 138904-48-0
| CAS No. | 138904-48-0 |
| Molecular Formula | C7H4N4O |
| Molecular Weight | 160.13 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 160.13 g/mol gives 7-Oxo-4,7-dihydropyrazolo[1,5-a]pyrimidine-3-carbonitrile distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies 7-Oxo-4,7-dihydropyrazolo[1,5-a]pyrimidine-3-carbonitrile (CAS 138904-48-0), a certified reference material (molecular formula C7H4N4O, MW 160.13 g/mol) for analytical method development and quality control.
The molecular framework of 7-Oxo-4,7-dihydropyrazolo[1,5-a]pyrimidine-3-carbonitrile (C7H4N4O) 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. 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 | C7H4N4O |
| Molecular Weight | 160.13 g/mol |
| Appearance | Pale yellow to 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1996 |
| Nitrogen Atoms | 4 |
Related Oxo Standards
- 5-Oxo-4,5-dihydropyrazolo[1,5-a]pyrimidine-3-carbonitrile (CAS 1224288-95-2)
- 2-Oxo-1,2-dihydropyrazolo[1,5-a]pyridine-6-carbonitrile (CAS 2734860-78-5)
- 4-Oxo-4,5-dihydropyrazolo[1,5-a]pyrazine-6-carbaldehyde (CAS 2844455-35-0)
- (2,3-Dihydropyrazolo[5,1-b]thiazol-6-yl)methanol (CAS 623565-45-7)
- (4,6-Dihydropyrazolo[1,5-c]thiazol-2-yl)methanol (CAS 623564-67-0)
- 4,5-Dihydropyrazolo[1,5-a]pyrimidine-5-carboxylic acid (CAS 1251023-46-7)
- 2,3-Dihydropyrazolo[5,1-b]thiazole-6-carbaldehyde (CAS 623565-43-5)
- 2,3-Dihydropyrazolo[5,1-b]thiazole-7-carbaldehyde (CAS 623565-44-6)
Recommended Standards
- Imidazo[1,2-c]isoxazolo[4,5-e]pyrimidine (CAS 135774-67-3)
- 4,6-Diformylpicolinonitrile (CAS 1393531-52-6)
- 2,6-Diformylisonicotinonitrile (CAS 1393550-72-5)
- Benzo[1,2-c:6,5-c']diisoxazole (CAS 120387-08-8)
- 2-(3-Chlorophenyl)-2-(piperazin-1-yl)ethan-1-ol (CAS 1183442-35-4)
- Methyl 4-chloro-5-iodo-2-methoxybenzoate (CAS 1629269-31-3)
- 2-(Ethylthio)phenylboronic acid (CAS 362045-33-8)
- 1-bromo-2-(chloromethyl)benzene (CAS 578-51-8)
- 1-(1-Ethylpyrrolidin-2-yl)-N-(4-methoxybenzyl)methanamine (CAS 727360-94-3)
- pTH (1-44) (human) (CAS 85568-24-7)
- 2-(2,3-Dimethoxybenzoyl)-5-(1,3-dioxolan-2-yl)thiophene (CAS 898778-98-8)
- 2-(p-Tolyl)-1,4,5,6-tetrahydropyrimidine (CAS 62460-57-5)
- 2-(4-Chlorophenyl)-1,3-thiazole-4-sulfonyl chloride (CAS 1305711-66-3)
- D-β-Asp9-Tirzepatide (CAS CATO-CPTD788932)
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