(3R,5S)-5-(3,5-Dimethyl-2-propoxy)-3-isobutyl Sildenafil CAS 1621873-33-3
| CAS No. | 1621873-33-3 |
| Molecular Formula | C25H36N6O4S |
| Molecular Weight | 516.66 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
(3R,5S)-5-(3,5-Dimethyl-2-propoxy)-3-isobutyl Sildenafil (CAS 1621873-33-3), molecular formula C25H36N6O4S and molecular weight 516.66 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, (3R,5S)-5-(3,5-Dimethyl-2-propoxy)-3-isobutyl Sildenafil (C25H36N6O4S) 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 11.0, corresponding to approximately 11 ring(s) or double-bond equivalent(s). With a molecular weight of 516.66 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 analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), (3R,5S)-5-(3,5-Dimethyl-2-propoxy)-3-isobutyl Sildenafil 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.
Physical & Chemical Properties
| Molecular Formula | C25H36N6O4S |
| Molecular Weight | 516.66 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1993 |
| Nitrogen Atoms | 6 |
| Sulfur Atoms | 1 |
Recommended Standards
- Udenafil (CAS 268203-93-6)
- 1,4-Bis[2-(9-ethylcarbazol-3-yl)vinyl]benzene (CAS 62608-15-5)
- Methisosildenafil Impurity 2 (CAS 1425504-78-4)
- Methyl (5-((4-hydroxyphenyl)sulfinyl)-1H-benzo[d]imidazol-2-yl)carbamate (CAS 83116-32-9)
- (1-Isobutyl-1H-imidazol-5-yl)methanamine (CAS 1177324-54-7)
- 3-Cyclopropoxy-4-isopropyl-N-methylbenzamide (CAS 1243282-31-6)
- Anti-Inflammatory Peptide 3 (CAS 118850-73-0)
- 6-Amino-5-(cyclopropylamino)-1,3-dimethylpyrimidine-2,4(1H,3H)-dione (CAS 1707375-91-4)
- tert-butyl (2S)-2-tert-butylpiperazine-1-carboxylate (CAS 1263316-22-8)
- Adenosine-5-diphosphate trisodium salt (CAS 2092-65-1)
- 1-(5-(Difluoromethoxy)pyridin-2-yl)ethan-1-one (CAS 1454887-03-6)
- N-(2-(2-(2,4-dimethylphenoxy)acetyl)hydrazine-1-carbonothioyl)benzamide (CAS 650633-38-8)
- tert-Butyl (R)-(1-(6-chloropyridazin-3-yl)pyrrolidin-3-yl)carbamate (CAS 1421033-39-7)
- Semaglutide Impurity 16 (CAS CATO-C4X-222616)
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