Pirfenidone Impurity 7 CAS 501935-40-6
| CAS No. | 501935-40-6 |
| Molecular Formula | C6H7N3O |
| Molecular Weight | 137.14 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Pirfenidone Impurity 7 is closely related to an amide group, a hydroxyl group, an ether linkage, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Pirfenidone Impurity 7 (CAS 501935-40-6) is a certified pharmaceutical impurity reference standard with the molecular formula C6H7N3O and a molecular weight of 137.14 g/mol.
The molecular framework of Pirfenidone Impurity 7 (C6H7N3O) 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 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.
As a certified reference material (CRM), Pirfenidone Impurity 7 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 | C6H7N3O |
| Molecular Weight | 137.14 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1984 |
| Nitrogen Atoms | 3 |
Related Pirfenidone Standards
- Pirfenidone Impurity 16 (CAS CATO-C4X-222916)
- Pirfenidone Impurity 17 (CAS 126209-21-0)
- Pirfenidone Impurity 25 (CAS 2512237-43-1)
- Pirfenidone Impurity 40 (CAS CATO-C4X-222940)
- Pirfenidone Impurity 26 (CAS 4588-15-2)
- Pirfenidone Impurity 27 (CAS 109285-68-7)
- Pirfenidone Impurity 28 (CAS 856952-50-6)
- Pirfenidone Impurity 38 (CAS CATO-C4X-222938)
Recommended Standards
- Salicylamide (CAS 65-45-2)
- 2-Nitrotoluene (CAS 88-72-2)
- Nicotine Impurity 7 (CAS 3222-49-9)
- 4-Nitrotoluene (CAS 99-99-0)
- Haloperidol Impurity 39 (CAS 52669-92-8)
- Oseltamivir Impurity 123 (CAS CATO-C4X-1720123)
- Upadacitinib Impurity 37 (CAS CATO-C4X-240537)
- 2-(3,4-Dihydroisoquinolin-2(1h)-yl)propanoic acid (CAS 938350-35-7)
- 1-Hydroxyisoquinoline-8-carbonitrile (CAS 1337882-11-7)
- 2-Oxo-1,2,3,4-tetrahydroquinoline-6-carbonyl chloride (CAS 1279882-34-6)
- 2-Amino-9-((2-hydroxyethoxy)methyl)-8-iodo-1H-purin-6(9H)-one (CAS 91897-99-3)
- 2-hydroxy-4-oxo-2-pentenoic acid methyl ester 20577-61-1 A814715 methyl 2-oxidanyl-4-oxidanylidene-pent-2-enoate (CAS 20577-61-1)
- (E)-2-chloro-N-((hydroxyamino)methylene)acetamide (CAS 1785917-18-1)
- Semaglutide impurity 63 (CAS CATO-C4X-222663)
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