Diphenyl((phenylthio)methyl)phosphine oxide CAS 31238-57-0
| CAS No. | 31238-57-0 |
| Molecular Formula | C19H17OPS |
| Molecular Weight | 324.38 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
Diphenyl((phenylthio)methyl)phosphine oxide (CAS 31238-57-0) is a high-purity analytical reference standard with the molecular formula C19H17OPS and a molecular weight of 324.38 g/mol.
Owing to a steroid core, sulfur-containing functionality, organophosphorus functionality, a hydroxyl group, an ether linkage, Diphenyl((phenylthio)methyl)phosphine oxide is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 324.38 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C19H17OPS |
| Molecular Weight | 324.38 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 11.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1965 |
| Sulfur Atoms | 1 |
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