Fezolinetant Impurity 19 CAS CATO-C4X-327019
| CAS No. | CATO-C4X-327019 |
| Molecular Formula | C18H25N5O5S |
| Molecular Weight | 423.49 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Fezolinetant Impurity 19 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.
CATO supplies Fezolinetant Impurity 19 (CAS CATO-C4X-327019), a pharmacopoeial impurity reference standard (molecular formula C18H25N5O5S, MW 423.49 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Fezolinetant Impurity 19 (C18H25N5O5S) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 9.0, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 423.49 g/mol, it falls into the moderately-high-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
Physical & Chemical Properties
| Molecular Formula | C18H25N5O5S |
| Molecular Weight | 423.49 g/mol |
| Purity | >95% |
| 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 5 |
| Sulfur Atoms | 1 |
Related Fezolinetant Standards
- Fezolinetant Impurity 11 (CAS CATO-C4X-327011)
- Fezolinetant Impurity 4 (CAS 2854332-29-7)
- Fezolinetant Impurity 31 (CAS CATO-C4X-327031)
- Fezolinetant impurity 2 (CAS 1429558-79-1)
- Fezolinetant Impurity 23 (CAS CATO-C4X-327023)
- Fezolinetant Impurity 6 (CAS 2759134-53-5)
- Fezolinetant impurity 5 (CAS 2854332-45-7)
- Fezolinetant Impurity 30 (CAS CATO-C4X-327030)
Recommended Standards
- Pazopanib Impurity 38 (CAS 1252927-47-1)
- tri-tert-Butyl benzene-1,3,5-triyltricarbamate (CAS 1009345-48-5)
- Pazopanib Impurity 3 (CAS 444731-47-9)
- Bortezomib Impurity 27 Sodium Salt (CAS 16480-57-2)
- Relugolix Impurity 212 (CAS CATO-C4X-2429212)
- Carfilzomib Impurity N1 (CAS 1396006-47-5)
- Cefprozil EP Impurity F (CAS 107937-01-9)
- Verapamil EP Impurity C (CAS 3490-05-9)
- 4-(3,4,5,6-Tetrahydro-[2,3'-bipyridin]-2'-yl)morpholine (CAS 1352538-36-3)
- (S)-2-Amino-N-ethyl-3-methyl-N-(2-methylbenzyl)butanamide (CAS 1306444-67-6)
- 4-(4-(Thiophen-2-yl)pyrimidin-2-yl)phenyl furan-2-carboxylate (CAS 477857-30-0)
- 3-(n-(2,4-Dimethylphenyl)sulfamoyl)-4-methylbenzoic acid (CAS 884990-58-3)
- 4-Bromo-3-chlorobenzyl Alcohol (CAS 120077-68-1)
- Tirzepatide Impurity 18 (CAS CATO-C4X-324018)
Why CATO?
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- 130,000+ catalog items in stock, COA supplied with every batch
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