| CAS No. | 1021879-81-1 |
| Molecular Formula | C20H17N4O2PS |
| Molecular Weight | 408.41 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
The occurrence of Diphenyl(((1-phenyl-1H-tetrazol-5-yl)sulfinyl)methyl)phosphine oxide is closely related to a steroid core, an amide group, a sulfone group, organophosphorus functionality, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Diphenyl(((1-phenyl-1H-tetrazol-5-yl)sulfinyl)methyl)phosphine oxide (CAS 1021879-81-1) is a high-purity analytical reference standard with the molecular formula C20H17N4O2PS and a molecular weight of 408.41 g/mol.
Structurally, Diphenyl(((1-phenyl-1H-tetrazol-5-yl)sulfinyl)methyl)phosphine oxide (C20H17N4O2PS) contains a steroid core, an amide group, a sulfone group, organophosphorus functionality, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 14.5, corresponding to approximately 14 ring(s) or double-bond equivalent(s). With a molecular weight of 408.41 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).
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.
CATO manufactures Diphenyl(((1-phenyl-1H-tetrazol-5-yl)sulfinyl)methyl)phosphine oxide 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.
| Molecular Formula | C20H17N4O2PS |
| Molecular Weight | 408.41 g/mol |
| Purity | 97%+ |
| 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) | 14.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1988 |
| Nitrogen Atoms | 4 |
| Sulfur Atoms | 1 |