Sildenafil Impurity 79 CAS CATO-C4X-112879
| CAS No. | CATO-C4X-112879 |
| Molecular Formula | C19H30N4O4S |
| Molecular Weight | 410.53 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Sildenafil Impurity 79 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.
As a process- or degradation-related impurity, Sildenafil Impurity 79 (CAS CATO-C4X-112879, C19H30N4O4S) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Sildenafil Impurity 79 (C19H30N4O4S) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
Physical & Chemical Properties
| Molecular Formula | C19H30N4O4S |
| Molecular Weight | 410.53 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 4 |
| Sulfur Atoms | 1 |
Related Sildenafil Standards
- Sildenafil Impurity 68 (CAS CATO-C4X-112868)
- Sildenafil Impurity 6 (CAS 501120-42-9)
- Sildenafil Impurity 7 (CAS 139756-22-2)
- Sildenafil Impurity 15 (CAS 2512206-40-3)
- Sildenafil Impurity 269 (CAS CATO-C4X-1128269)
- Sildenafil Impurity 292 (CAS CATO-C4X-1128292)
- Sildenafil Impurity 38 (CAS 319491-68-4)
- Sildenafil Impurity 102 (CAS CATO-C4X-1128102)
Recommended Standards
- Mirabegron Impurity 105 (CAS CATO-C4X-1032105)
- Tolterodine Impurity 29 (CAS 124937-85-5)
- Dicyclohexyl(2',6'-dimethoxy-[1,1'-biphenyl]-2-yl)phosphine (CAS 657408-07-6)
- Benfuracarb (CAS 82560-54-1)
- Varenicline Impurity N22 (CAS 2759288-58-7)
- Thiamazole EP Impurity A (CAS 122-07-6)
- Apremilast Impurity 25 (CAS 608142-27-4)
- 3-(3-Nitrophenoxy)azetidine, HCl (CAS 1373253-27-0)
- 4-(3-(Trifluoromethyl)phenyl)thiazol-2(3H)-one (CAS 1095163-09-9)
- 2-Formyl-6-methylisonicotinonitrile (CAS 448907-01-5)
- 4-Fluoro-3-(hydroxymethyl)benzeneboronic acid, 97% (CAS 481681-02-1)
- 2-Amino-5-chloro-3-methylbenzamide (CAS 1006619-83-5)
- 6-Bromo-N,4-dimethylpyridin-3-amine (CAS 1841079-99-9)
- Fibrinopeptide A, human TFA (CAS 61533-47-9)
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