Pirfenidone Impurity 25 CAS 2512237-43-1
| CAS No. | 2512237-43-1 |
| Molecular Formula | C6H6N2O2 |
| Molecular Weight | 138.12 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 Pirfenidone Impurity 25.
Pirfenidone Impurity 25 (CAS 2512237-43-1) is a certified pharmaceutical impurity reference standard with the molecular formula C6H6N2O2 and a molecular weight of 138.12 g/mol.
Structurally, Pirfenidone Impurity 25 (C6H6N2O2) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 138.12 g/mol, it falls into the low-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
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 | C6H6N2O2 |
| Molecular Weight | 138.12 g/mol |
| Purity | >90% |
| 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2000 |
| Nitrogen Atoms | 2 |
Related Pirfenidone Standards
- Pirfenidone Impurity 40 (CAS CATO-C4X-222940)
- Pirfenidone Impurity 16 (CAS CATO-C4X-222916)
- Pirfenidone Impurity 17 (CAS 126209-21-0)
- Pirfenidone Impurity 7 (CAS 501935-40-6)
- 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
- Nicotinamide EP Impurity E (CAS 1986-81-8)
- Acipimox Impurity 7 (CAS 6164-79-0)
- Finerenone Impurity 27 (CAS CATO-C4X-288027)
- Acipimox Impurity 1 (CAS 5521-55-1)
- Flucloxacillin EP Impurity D (CAS 3919-74-2)
- Glumetinib Impurity 3 (CAS CATO-C4X-32593)
- Avatrombopag Impurity 79 (CAS CATO-C4X-223479)
- N-(4-(Azepan-1-yl)but-2-yn-1-yl)benzo[d][1,3]dioxole-5-carboxamide (CAS 1396802-25-7)
- 1-(4-Bromo-2,3-difluorophenyl)ethanol (CAS 1823588-17-5)
- N-(2-Bromo-4-fluorophenyl)-3-chlorobenzamide (CAS 1039903-59-7)
- (3-Fluoro-4-methoxyphenyl)methanesulfonyl chloride (CAS 1178706-94-9)
- 4-(1-(tert-Butoxycarbonyl)piperidin-2-yl)benzoic acid (CAS 908334-23-6)
- 6-Methoxy-3-methyl-2-(2-nitrovinyl)benzofuran (CAS 37733-64-5)
- Peptide 440 (CAS CATO-CPTD788440)
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