Sildenafil Citrate CAS 171599-83-0
| CAS No. | 171599-83-0 |
| Molecular Formula | C22H30N6O4S |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, Sildenafil Citrate is typically pale yellow to yellow amorphous powder. Its solid-state physicochemical attributes — including a molecular weight of 666.70 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.
Sildenafil Citrate (CAS 171599-83-0) is a high-purity analytical reference standard with the molecular formula C22H30N6O4SC6H8O7 and a molecular weight of 666.70 g/mol.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
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 | C22H30N6O4S C6H8O7 |
| Molecular Weight | 666.70 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) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2006 |
| Nitrogen Atoms | 6 |
| Sulfur Atoms | 1 |
Related Sildenafil Standards
- Sildenafil Impurity N6 (CAS 1004455-71-3)
- Sildenafil Impurity 258 (CAS 1007310-62-4)
- Sildenafil Impurity 256 (CAS 1027192-9-2)
- Sildenafil Impurity 5 (CAS 1058653-74-9)
- Sildenafil Impurity 29 (CAS 1093065-15-6)
- Sildenafil EP Impurity B (CAS 1094598-75-0)
- Sildenafil-D3 (CAS 1126745-90-1)
- Sildenafil Impurity 62 (CAS 116833-23-9)
Recommended Standards
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- 2-((4-Methoxybenzyl)amino)-2-phenyl-N-(thiazol-2-yl)acetamide (CAS 1031209-53-6)
- 5-[5-Carboxypyrimidin-2-yl]isophthalic acid (CAS 1202853-57-3)
- 1-(4-Amino-1,2,5-oxadiazol-3-yl)-5-(methoxymethyl)-1H-1,2,3-triazole-4-carboxamide (CAS 312267-70-2)
- (E)-5-amino-2-(4-nitro-2-sulfostyryl)benzenesulfonic acid, sodium salt (CAS 6634-82-8)
- N-(2,4-Difluorophenyl)-2-iodoacetamide (CAS 1344212-60-7)
- 1-Bromo-2-(difluoromethoxy)-4-(trifluoromethyl)benzene (CAS 1417567-20-4)
- [Tyr0] Fibrinopeptide A, human (CAS 103226-11-5)
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