Ensifentrine impurity 33 CAS CATO-C4X-335333
| CAS No. | CATO-C4X-335333 |
| Molecular Formula | C10H11N3O2 |
| Molecular Weight | 205.21 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, Ensifentrine impurity 33 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 205.21 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO supplies Ensifentrine impurity 33 (CAS CATO-C4X-335333), a pharmacopoeial impurity reference standard (molecular formula C10H11N3O2, MW 205.21 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.
As a certified reference material (CRM), Ensifentrine impurity 33 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 | C10H11N3O2 |
| Molecular Weight | 205.21 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 3 |
Related Ensifentrine Standards
- Ensifentrine Impurity 29 (CAS 1409292-22-3)
- Ensifentrine Impurity 28 (CAS 1266868-06-7)
- Ensifentrine Impurity 27 (CAS CATO-C4X-335327)
- Ensifentrine impurity 7 (CAS 91209-79-9)
- Ensifentrine impurity 49 (CAS 1196-12-9)
- Ensifentrine impurity 45 (CAS 3088358-10-2)
- Ensifentrine impurity 48 (CAS 20488-59-9)
- Ensifentrine impurity (CAS 4359-64-2)
Recommended Standards
- Selumetinib Impurity 18 (CAS CATO-C4X-305318)
- Tivozanib Impurity 27 (CAS CATO-C4X-340027)
- Fruquintinib Impurity 13 (CAS CATO-C4X-303713)
- Linaprazan Impurity 4 (CAS CATO-C4X-34864)
- (R,R)-Indacaterol Impurity 25 (CAS 753498-27-0)
- Others Impurity 263231 (CAS CATO-C3D-263231)
- Orforglipron Impurity 9 (CAS CATO-C4X-32349)
- N-(6-(Chloromethyl)-4-methoxypyridin-2-yl)acetamide (CAS 1393543-85-5)
- 5-Fluoro-2-methyl-n-propylbenzenesulfonamide (CAS 1094795-76-2)
- (R)-6-(1-amino-2-methylpropyl)pyridin-2-amine (CAS 1187931-08-3)
- 1-Cyanocyclopropane-1-sulfonamide (CAS 1108658-23-6)
- 1-(propan-2-yl)-1H-pyrazol-3-amine (CAS 857267-04-0)
- (1R,2S,3S,5S)-3-Phenyl-2-(3-methyl-1,2,4-oxadiazol-5-yl) Tropane (CAS 147059-95-8)
- Liraglutide Impurity 15 TFA Salt (CAS CATO-C4X-199215)
Why CATO?
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- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com