Sildenafil Impurity 31 CAS CATO-C4X-112831
| CAS No. | CATO-C4X-112831 |
| Molecular Formula | C18H21N3O2 |
| Molecular Weight | 311.38 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures Sildenafil Impurity 31 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
CATO supplies Sildenafil Impurity 31 (CAS CATO-C4X-112831), a pharmacopoeial impurity reference standard (molecular formula C18H21N3O2, MW 311.38 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C18H21N3O2, Sildenafil Impurity 31 contains a steroid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 311.38 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
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 | C18H21N3O2 |
| Molecular Weight | 311.38 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 3 |
Related Sildenafil Standards
- Sildenafil Impurity 2 (CAS 332374-42-2)
- Sildenafil Impurity 299 (CAS CATO-C4X-1128299)
- Sildenafil Impurity 69 (CAS CATO-C4X-112869)
- Sildenafil Impurity 77 (CAS CATO-C4X-112877)
- Sildenafil Impurity 259 (CAS CATO-C4X-1128259)
- Sildenafil Impurity 92 (CAS CATO-C4X-112892)
- Sildenafil Impurity 101 (CAS CATO-C4X-1128101)
- Sildenafil Impurity 71 (CAS 960009-35-2)
Recommended Standards
- Edoxaban Impurity 85 (CAS 480451-97-6)
- Anastrozole Impurity 8 (CAS CATO-C4X-12398)
- Edoxaban Impurity 35 (CAS 480450-69-9)
- Anastrozole Impurity 9 (CAS 120512-03-0)
- Empagliflozin Impurity 24 (CAS CATO-C4X-106524)
- Cefmetazole Impurity 28 (CAS CATO-C4X-150728)
- Zolmitriptan Impurity 35 (Mixture of Diastereomers) (CAS CATO-C4X-135135)
- 1-(((5-Methylthiophen-2-yl)methyl)amino)propan-2-ol (CAS 774191-32-1)
- 1,3,5-Trimethyl-2,4-dioxo-1h,2h,3h,4h-pyrido[2,3-d]pyrimidine-7-carboxylic acid (CAS 901864-90-2)
- Ethyl(2-methanesulfonylethyl)amine (CAS 1183893-79-9)
- 2-(1-((tert-Butoxycarbonyl)amino)cyclobutyl)acetic acid (CAS 249762-02-5)
- 3'-Cyano-5-hydroxy-[1,1'-biphenyl]-3-carboxylic acid (CAS 1258637-09-0)
- 2-(1-(4-Bromobenzyl)piperidin-3-yl)-1H-benzo[d]imidazole (CAS 887218-37-3)
- Semaglutide impurity 80 (CAS CATO-C4X-222680)
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