Diphenyl(phenylethynyl)phosphine CAS 7608-17-5
| CAS No. | 7608-17-5 |
| Molecular Formula | C20H15P |
| Molecular Weight | 286.31 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(phenylethynyl)phosphine (CAS 7608-17-5), molecular formula C20H15P and molecular weight 286.31 g/mol, is a CATO reference standard with documented purity and traceability.
Diphenyl(phenylethynyl)phosphine (C20H15P) contains organophosphorus functionality, a polycyclic aromatic system. Its high carbon-to-hydrogen ratio confers good lipid solubility; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 | C20H15P |
| Molecular Weight | 286.31 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 13.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1959 |
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Recommended Standards
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- Chlorodimethyl(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)silane (CAS 929887-16-1)
- 4,6-Diamino-1,3,5-triazine-2-thiol (CAS 767-17-9)
- 5-Chloro-3-ethyl-1-(2-fluorophenyl)-1H-pyrazole-4-carbaldehyde (CAS 1152583-51-1)
- 2-Bromo-4-chloro-5-fluorobenzoic acid (CAS 157165-24-7)
- 4-((6,7-Dimethoxyquinolin-4-yl)oxy)-2,5-dimethylaniline (CAS 286371-46-8)
- 5-Methyl-6-phenoxynicotinic acid (CAS 151502-55-5)
- 7-CYCLOPROPYL-3,4-DIHYDROPYRIDO[2,3-B]PYRAZIN-2(1H)-ONE (CAS 1476730-52-5)
- 2-(Azepan-1-yl)-5-chloropyrimidine-4-carboxylic acid (CAS 329268-81-7)
- Semaglutide impurity 260 (CAS CATO-C4X-2226260)
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