Pyrazoloquinolone Impurity 4 CAS CATO-C4X-23894
| CAS No. | CATO-C4X-23894 |
| Molecular Formula | C16H22N4 |
| Molecular Weight | 270.37 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Pyrazoloquinolone Impurity 4.
Pyrazoloquinolone Impurity 4 (CAS CATO-C4X-23894) is a certified pharmaceutical impurity reference standard with the molecular formula C16H22N4 and a molecular weight of 270.37 g/mol.
The molecular framework of Pyrazoloquinolone Impurity 4 (C16H22N4) is characterized by a nitrogen-containing heterocyclic scaffold, a nitrile group. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), 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 quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
CATO manufactures Pyrazoloquinolone Impurity 4 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 | C16H22N4 |
| Molecular Weight | 270.37 g/mol |
| Purity | >95% |
| 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 |
| Nitrogen Atoms | 4 |
Related Pyrazoloquinolone Standards
Recommended Standards
- Dienogest EP Impurity B (CAS 5173-46-6)
- 17α-Trenbolone (CAS 80657-17-6)
- Doxylamine Hydrogen Succinate EP Impurity A (CAS CATO-C4X-178921)
- Dotinurad Impurity 57 (CAS CATO-C4X-249457)
- Tizanidine impurity 28 (CAS CATO-C4X-144528)
- Bortezomib Impurity 5 (CAS 1132709-16-0)
- Esomeprazole Impurity 65 (CAS CATO-C4X-111265)
- (R)-1-(3-Aminopiperidin-1-yl)prop-2-en-1-one (CAS 1629584-96-8)
- Fludarabine Phosphate EP Impurity I (CAS 62314-91-4)
- 4-Tert-butyl-2-nitrobenzoic acid (CAS 103797-19-9)
- 1-(N-Methylpiperidin-4-yl-methyl)piperazine (CAS 496808-04-9)
- 5,6-Dimethyl-4-(naphthalen-2-yloxy)thieno[2,3-d]pyrimidine (CAS 315692-48-9)
- 3-(3,5-Difluorophenoxy)propanenitrile (CAS 844648-16-4)
- Semaglutide impurity 106 (CAS CATO-C4X-2226106)
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