Pirfenidone Impurity 33 CAS 108-86-1
| CAS No. | 108-86-1 |
| Molecular Formula | C6H5Br |
| Molecular Weight | 157.01 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of Pirfenidone Impurity 33 (C6H5Br) is characterized by bromine substitution, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
CATO supplies Pirfenidone Impurity 33 (CAS 108-86-1), a pharmacopoeial impurity reference standard (molecular formula C6H5Br, MW 157.01 g/mol) used for the identification and quantification of trace impurities in APIs.
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
CATO manufactures Pirfenidone Impurity 33 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 | C6H5Br |
| Molecular Weight | 157.01 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°C, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | Br-containing |
Related Pirfenidone Standards
- Pirfenidone Impurity 43 (CAS 7464-14-4)
- Pirfenidone Impurity 44 (CAS 21901-18-8)
- Pirfenidone Impurity 32 (CAS 92-53-5)
- Pirfenidone Impurity 35 (CAS 2412-49-9)
- Pirfenidone Impurity 42 (CAS 3510-66-5)
- Pirfenidone Impurity 26 (CAS 4588-15-2)
- Pirfenidone Impurity 25 (CAS 2512237-43-1)
- Pirfenidone Impurity 40 (CAS CATO-C4X-222940)
Recommended Standards
- 1-Bromohexa-2,4-diyne (CAS 4245-89-0)
- (6-ethylpyridin-3-yl)boronic acid (CAS 1001907-69-2)
- 1,1-Bis(chloromethyl)-2-fluorocyclopropane (CAS 1823565-88-3)
- (5-ethylpyridin-3-yl)boronic acid (CAS 1001907-70-5)
- Roxadustat Impurity 127 (CAS CATO-C4X-2213127)
- Relugoli Impurity 139 (CAS CATO-C4X-2429139)
- Daunorubicin Impurity 16 (CAS CATO-C4X-193716)
- 1-tert-butoxycarbonyl-5-methyl-pyrrolidine-2-carboxylic acid (CAS 1248546-01-1)
- 5-Amino-3-(cyanomethyl)-1-(2-hydroxyethyl)-1H-pyrazole-4-carbonitrile (CAS 53871-48-0)
- 1-Benzyl-5-bromo-1H-1,2,4-triazole (CAS 1352925-80-4)
- 2-Oxa-3-azabicyclo[2.2.2]oct-5-ene (CAS 7160-44-3)
- 6-(Methylsulfanyl)-4,5,7,9,13-pentaazapentacyclo[11.8.0.0^{3,11}.0^{4,8}.0^{16,21}]henicosa-3(11),5,7,9,16(21),17,19-heptaen-12-one (CAS 339012-07-6)
- 3-Chloro-5-methoxybenzofuran (CAS 77440-96-1)
- (Tyr?)-C-Type Natriuretic Peptide (32-53) (human, porcine, rat) (CAS 142878-79-3)
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