Pirfenidone Impurity 44 CAS 21901-18-8
Purity >95%In StockPharmacopoeial Impurity Standards
| CAS No. | 21901-18-8 |
| Molecular Formula | C6H6N2O3 |
| Molecular Weight | 154.12 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Pirfenidone Impurity 44 (CAS 21901-18-8) is a high-purity pharmacopoeial impurity standards reference standard from CATO, an ISO 17034 accredited reference material producer. Molecular formula: C6H6N2O3. Molecular weight: 154.12 g/mol. Each batch is supplied with a Certificate of Analysis (COA).
Physical & Chemical Properties
| Molecular Formula | C6H6N2O3 |
| Molecular Weight | 154.12 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| 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.) | 1963 |
| Nitrogen Atoms | 2 |
Related Pirfenidone Standards
- Pirfenidone Impurity 43 (CAS 7464-14-4)
- Pirfenidone Impurity 33 (CAS 108-86-1)
- Pirfenidone Impurity 32 (CAS 92-53-5)
- Pirfenidone Impurity 35 (CAS 2412-49-9)
- Pirfenidone Impurity 26 (CAS 4588-15-2)
- Pirfenidone Impurity 25 (CAS 2512237-43-1)
- Pirfenidone Impurity 40 (CAS CATO-C4X-222940)
- Pirfenidone Impurity 16 (CAS CATO-C4X-222916)
Recommended Standards
- Finerenone Impurity 225 (CAS CATO-C4X-2880225)
- Salicylic Acid Impurity 25 (CAS 303-07-1)
- 5-Methyl-4-nitropyridin-2(1H)-one (CAS 1416354-34-1)
- Luliconazole impurity 18 (CAS CATO-C4X-285318)
- Tetracaine Impurity 5 (CAS 94-32-6)
- 6-Amino-1-(2-methoxyphenyl)pyrimidine-2,4(1H,3H)-dione (CAS 180028-89-1)
- rel-(1R,2S)-2-phenylcyclohexanol (CAS 2362-61-0)
- 3-(4-Methoxyphenyl)-1-methyl-1H-indol-2-amine (CAS 62693-66-7)
- Methyl 4-(cyclopropylmethyl)-3-oxo-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-7-carboxylate (CAS 1707603-12-0)
- Semaglutide Impurity 131 (CAS 2618647-80-4)
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 13829788188 / jacky.chen@cato-chem.com