Sildenafil Impurity 23 CAS 200575-15-1
| CAS No. | 200575-15-1 |
| Molecular Formula | C22H32N6O5S |
| Molecular Weight | 492.59 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Sildenafil Impurity 23 (CAS 200575-15-1) is a certified pharmaceutical impurity reference standard with the molecular formula C22H32N6O5S and a molecular weight of 492.59 g/mol.
The molecular framework of Sildenafil Impurity 23 (C22H32N6O5S) is characterized by a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C22H32N6O5S |
| Molecular Weight | 492.59 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2014 |
| Nitrogen Atoms | 6 |
| Sulfur Atoms | 1 |
Related Sildenafil Standards
- Sildenafil Impurity 279 (CAS CATO-C4X-1128279)
- Sildenafil Impurity 301 (CAS CATO-C4X-1128301)
- Sildenafil EP Impurity B (CAS 1094598-75-0)
- Sildenafil Impurity 84 (CAS CATO-C4X-112884)
- Sildenafil EP Impurity A (CAS 1391053-95-4)
- Sildenafil Impurity C31 (CAS 2196244-90-1)
- Sildenafil Impurity 267 (CAS 2305789-77-7)
- Sildenafil Impurity 89 (CAS 2520113-03-3)
Recommended Standards
- Methyl 3-(2-{[2-(4-methoxybenzenesulfonamido)phenyl]sulfanyl}acetamido)thiophene-2-carboxylate (CAS 477869-09-3)
- 5-(4-(Benzyloxy)-3-methoxyphenyl)-1-(2-(dimethylamino)ethyl)-3-hydroxy-4-(thiophene-2-carbonyl)-1H-pyrrol-2(5H)-one (CAS 617694-15-2)
- 4-[4-(Diphenylmethyl)piperazine-1-carbonyl]-5-methyl-N-[(methylcarbamothioyl)amino]-1,2-oxazole-3-carboxamide (CAS 338408-80-3)
- Sanggenol P (CAS 1351931-30-0)
- Empagliflozin Impurity 127 (CAS CATO-C4X-1065127)
- Nizatidine impurity 17 (CAS CATO-C4X-138017)
- Baloxavir Impurity 116 (CAS CATO-C4X-2108116)
- (R)-tert-Butyl (1-(2-chloroacetyl)pyrrolidin-3-yl)(isopropyl)carbamate (CAS 1354019-44-5)
- 2-(Pentan-3-yloxy)acetaldehyde (CAS 1141364-90-0)
- tert-Butyl 3-bromo-4-propionyl-1H-indole-1-carboxylate (CAS 1707391-50-1)
- 2-Benzyloxy-1-bromo-4-fluorobenzene (CAS 202857-88-3)
- N-(2-((2-cyanophenyl)thio)phenyl)-2-phenoxyacetamide (CAS 866008-10-8)
- 5-(3-Bromo-5-ethoxy-4-((2-methylbenzyl)oxy)phenyl)-1,3,4-oxadiazol-2-amine (CAS 1706448-82-9)
- FMRF-Like Peptide from snail Helix aspersa (CAS 98495-35-3)
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