| CAS No. | 680214-47-5 |
| Molecular Formula | C21H19ClFN2O3PS |
| Molecular Weight | 464.88 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
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 (1-{[(3-chloro-4-fluoroanilino)carbothioyl]amino}ethyl)phosphonate (CAS 680214-47-5), molecular formula C21H19ClFN2O3PS and molecular weight 464.88 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, diphenyl (1-{[(3-chloro-4-fluoroanilino)carbothioyl]amino}ethyl)phosphonate (C21H19ClFN2O3PS) contains a steroid core, an amide group, a sulfone group, a phosphonate group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 12.5, corresponding to approximately 12 ring(s) or double-bond equivalent(s). With a molecular weight of 464.88 g/mol, it falls into the moderately-high-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
As a certified reference material (CRM), diphenyl (1-{[(3-chloro-4-fluoroanilino)carbothioyl]amino}ethyl)phosphonate 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.
| Molecular Formula | C21H19ClFN2O3PS |
| Molecular Weight | 464.88 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 12.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
| Halogen Content | F/Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |