Pirfenidone Impurity 21 CAS 887406-53-3
| CAS No. | 887406-53-3 |
| Molecular Formula | C12H11NO2 |
| Molecular Weight | 201.22 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Pirfenidone Impurity 21 is closely related to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Pirfenidone Impurity 21 (CAS 887406-53-3) is a certified pharmaceutical impurity reference standard with the molecular formula C12H11NO2 and a molecular weight of 201.22 g/mol.
Pirfenidone Impurity 21 (C12H11NO2) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. Its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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 21 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 | C12H11NO2 |
| Molecular Weight | 201.22 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; 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.) | 1987 |
| Nitrogen Atoms | 1 |
Related Pirfenidone Standards
- Pirfenidone Impurity 10 (CAS CATO-C4X-222910)
- Pirfenidone Impurity 12 (CAS 887406-49-7)
- Pirfenidone Impurity 23 (CAS 851518-71-3)
- Pirfenidone Impurity 45 (CAS CATO-C4X-222945)
- Pirfenidone Impurity 8 (CAS CATO-C4X-22298)
- Pirfenidone Impurity 48 (CAS CATO-C4X-222948)
- Pirfenidone-d5 (5-Methyl-N-Phenyl-2-1H-Pyridone-d5) (CAS 1020719-62-3)
- Pirfenidone D3 (CAS 1093951-85-9)
Recommended Standards
- Hydantoin Impurity 27 (CAS 121565-48-8)
- Iguratimod Impurity 104 (CAS CATO-C4X-1826104)
- Finerenone Impurity 166 (CAS CATO-C4X-2880166)
- Dolutegravir Impurity 14 (CAS 127958-23-0)
- Fexofenadine Impurity 11 (CAS 1347311-10-7)
- Cefixime Impurity 23 (CAS CATO-C4X-113923)
- Suzetrigine Impurity 53 (CAS CATO-C4X-336953)
- Bicyclo[2.2.1]Heptane-7-carboxylic acid (CAS 5971-67-5)
- 3-(1-Ethyl-1,2,3,6-tetrahydropyridin-4-yl)-1H-indole (CAS 72808-70-9)
- 2-(2,4-Dimethylthiazol-5-yl)acetic acid (CAS 34272-65-6)
- 6-Tert-butyl-2-chloropyridine-3-carbonitrile (CAS 4138-20-9)
- Ethyl 5-(2-methoxy-2-oxoethyl)-4-oxo-4h,5h-[1,2]oxazolo[5,4-d]pyrimidine-3-carboxylate (CAS 1127366-89-5)
- Pamoic Acid-d10 (CAS 1215327-33-5)
- D-Ile12-Tirzepatide (CAS CATO-CPTD788921)
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