Diphenyl(phenylethynyl)phosphine oxide CAS 7608-18-6
| CAS No. | 7608-18-6 |
| Molecular Formula | C20H15OP |
| Molecular Weight | 302.31 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Diphenyl(phenylethynyl)phosphine oxide (CAS 7608-18-6), molecular formula C20H15OP and molecular weight 302.31 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, Diphenyl(phenylethynyl)phosphine oxide (C20H15OP) contains a steroid core, organophosphorus functionality, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 13.5, corresponding to approximately 13 ring(s) or double-bond equivalent(s). With a molecular weight of 302.31 g/mol, it falls into the moderately-high-molecular-weight range. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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(phenylethynyl)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.
Physical & Chemical Properties
| Molecular Formula | C20H15OP |
| Molecular Weight | 302.31 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, DMSO |
| 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
- Bis(2-naphthyl)phosphine oxide (CAS 78871-05-3)
- Methyl 3-[(2,4-dioxo-1,3-thiazolan-5-yliden)methyl]-1H-indole-2-carboxylate (CAS 860612-09-5)
- 8-Methoxy-2-oxo-N-(thiazol-2-yl)-2H-chromene-3-carboxamide (CAS 315239-97-5)
- N-(5-(Isoxazol-5-yl)-1,3,4-oxadiazol-2-yl)-2-(phenylthio)acetamide (CAS 952868-57-4)
- Methyl cyclohexylcarbamate (CAS 5817-68-5)
- Methyl 3-(methylamino)isoquinoline-6-carboxylate (CAS 1374258-90-8)
- 6-Chloro-2,7-dimethyl-7H-purine (CAS 1708263-49-3)
- (1-(2,3-Dichlorophenyl)cyclobutyl)methanamine (CAS 1934662-95-9)
- 1-(5-((2,4-Dichlorophenyl)thio)-4-nitrothiophen-2-yl)ethanone (CAS 1247819-56-2)
- 2-(Heptan-2-ylamino)cyclohexan-1-ol (CAS 1250709-08-0)
- 4-(4-Azidophenyl)butyric acid (CAS 103489-33-4)
- Maltol Related Compound 4 (CAS 126055-13-8)
- rel-tert-Butyl ((R)-1-((S)-oxiran-2-yl)-2-phenylethyl)carbamate (CAS 98818-35-0)
- Hexapeptide-9 (CAS 1228371-11-6)
Why CATO?
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