Ensifentrine impurity 6 CAS 298680-38-3
| CAS No. | 298680-38-3 |
| Molecular Formula | C33H32N4O5 |
| Molecular Weight | 564.63 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Ensifentrine impurity 6 (CAS 298680-38-3), a pharmacopoeial impurity reference standard (molecular formula C33H32N4O5, MW 564.63 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Ensifentrine impurity 6 (C33H32N4O5) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 20.0, corresponding to approximately 20 ring(s) or double-bond equivalent(s). With a molecular weight of 564.63 g/mol, it falls into the moderately-high-molecular-weight range. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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), Ensifentrine impurity 6 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 | C33H32N4O5 |
| Molecular Weight | 564.63 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°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) | 20.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 4 |
Related Ensifentrine Standards
- Ensifentrine impurity 17 (CAS 3046226-90-5)
- Ensifentrine impurity 18 (CAS CATO-C4X-335318)
- Ensifentrine impurity 39 (CAS CATO-C4X-335339)
- Ensifentrine impurity 19 (CAS CATO-C4X-335319)
- Ensifentrine impurity 20 (CAS CATO-C4X-335320)
- Ensifentrine impurity 15 (CAS CATO-C4X-335315)
- Ensifentrine impurity 14 (CAS CATO-C4X-335314)
- Ensifentrine impurity 31 (CAS CATO-C4X-335331)
Recommended Standards
- Endotoxin Substrate (CAS 68223-96-1)
- 2-(3-(Hydroxymethyl)-4-(8-((5-methyl-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazin-2-yl)amino)imidazo[1,2-b]pyridazin-6-yl)pyridin-2-yl)-3,4,6,7,8,9-hexahydropyrazino[1,2-a]indol-1(2H)-one (CAS 1433820-83-7)
- (11bR)-2,6-Bis(3,5-dimethylphenyl)-4-hydroxy-8,9,10,11,12,13,14,15-octahydrodinaphtho[2,1-d:1’,2’-f][1,3,2]dioxaphosphepine 4-Oxide (CAS 1065214-95-0)
- Nintedanib Impurity 18 (CAS CATO-C4X-181418)
- Darolutamide impurity 10 (CAS 1976022-48-6)
- Loteprednol impurity 14 (CAS 182068-96-8)
- Tucatinib Impurity 56（E-Isomer） (CAS CATO-C4X-260556)
- 2-Bromo-3-methoxy-5-methylpyrazine (CAS 1401072-21-6)
- 2,3,6-Trichloro-7-nitroquinoxaline (CAS 121830-25-9)
- Tert-butyl 4-(4-(methoxycarbonyl)benzyl)piperazine-1-carboxylate (CAS 844891-11-8)
- (2R,3R,4R,5R)-5-(2-Amino-6-chloro-9H-purin-9-yl)-2-(hydroxymethyl)-4-methoxytetrahydrofuran-3-ol (CAS 194034-59-8)
- 8-fluoro-2-hydroxy-6-methylquinoline-4-carboxylic acid (CAS 1248399-26-9)
- (2S,4R)-4-(4-Chlorobenzyl)pyrrolidine-2-carboxylic acid (CAS 1049978-20-2)
- Semaglutide Impurity 183 (CAS 159541-28-3)
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