Sildenafil Impurity 288 CAS CATO-C4X-1128288
| CAS No. | CATO-C4X-1128288 |
| Molecular Formula | C21H31N5O6S |
| Molecular Weight | 481.57 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 481.57 g/mol gives Sildenafil Impurity 288 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Sildenafil Impurity 288 (CAS CATO-C4X-1128288) is a certified pharmaceutical impurity reference standard with the molecular formula C21H31N5O6S and a molecular weight of 481.57 g/mol.
Structurally, Sildenafil Impurity 288 (C21H31N5O6S) 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 481.57 g/mol, it falls into the moderately-high-molecular-weight range. 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.
CATO manufactures Sildenafil Impurity 288 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.
Physical & Chemical Properties
| Molecular Formula | C21H31N5O6S |
| Molecular Weight | 481.57 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 Sildenafil Standards
- Sildenafil-d8 (CAS 951385-68-5)
- Sildenafil-D3 (CAS 1126745-90-1)
- Sildenafil Impurity 42 (CAS 2146091-79-2)
- Sildenafil Impurity 88 (CAS CATO-C4X-112888)
- Sildenafil Impurity 289 (CAS CATO-C4X-1128289)
- Sildenafil Impurity 293 (CAS CATO-C4X-1128293)
- Sildenafil Impurity 97 (CAS CATO-C4X-112897)
- Sildenafil (CAS 139755-83-2)
Recommended Standards
- 3-Amino-N,4-bis(4-methoxyphenyl)-6-phenylthieno[2,3-b]pyridine-2-carboxamide (CAS 333777-93-8)
- Upadacitinib Impurity 125 (CAS CATO-C4X-2405125)
- 3-Amino-N-(2,5-dimethoxyphenyl)-4,6-diphenylthieno[2,3-b]pyridine-2-carboxamide (CAS 337354-48-0)
- 3-(Cyclohexylmethyl)-5-{[(4-fluorophenyl)methyl]sulfanyl}-8,9-dimethoxy-2H,3H-imidazo[1,2-c]quinazolin-2-one (CAS 1024017-29-5)
- Ambroxol impurity 62 (CAS 397323-70-5)
- Pilocarpine Impurity 21 (CAS CATO-C4X-240121)
- Trimebutine EP Impurity E (CAS 84333-59-5)
- 3-Methyl-5,6-dihydroisoxazolo[4,5-d]pyridazine-4,7-dione (CAS 106609-04-5)
- Tulobuterol Impurity 22 (CAS 5639-00-9)
- 5-Cyclopropoxy-2-iodo-N,N-dimethylpyridin-3-amine (CAS 1243373-70-7)
- Methyl 7-bromoimidazo[1,2-a]pyridine-5-carboxylate (CAS 1379330-72-9)
- 3-(Cyclopentyloxy)-4-methylaniline (CAS 1154943-24-4)
- 5-Methyl-2-(methylamino)-4-phenyl-1H-pyrrole-3-carbonitrile (CAS 61404-83-9)
- Myristoyl Pentapeptide -4 acetate (CAS 959610-30-1(free base))
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com