Benzyldiphenylphosphine oxide CAS 2959-74-2
| CAS No. | 2959-74-2 |
| Molecular Formula | C19H17OP |
| Molecular Weight | 292.31 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.
Benzyldiphenylphosphine oxide (CAS 2959-74-2), molecular formula C19H17OP and molecular weight 292.31 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C19H17OP, Benzyldiphenylphosphine oxide contains a steroid core, organophosphorus functionality, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 292.31 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
As a certified reference material (CRM), Benzyldiphenylphosphine oxide 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.
Physical & Chemical Properties
| Molecular Formula | C19H17OP |
| Molecular Weight | 292.31 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) | 11.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
Related Benzyldiphenylphosphine Standards
Recommended Standards
- Benzo[1,3]dioxole-5-carboxylic acid (5-mercapto-4-methyl-4H-[1,2,4]triazol-3-ylmethyl)-amide (CAS 737779-74-7)
- Ethyl 2-(3-methyl-4-nitrophenyl)thiazole-4-carboxylate (CAS 885278-57-9)
- 5-Methyl-2-[(2-nitrophenyl)amino]-3-thiophenecarboxylic Acid Methyl Ester (CAS 72242-31-0)
- Ethyl 2-(6,7-dimethoxy-2-oxo-1,2,3,4-tetrahydroquinolin-3-yl)acetate (CAS 5415-50-9)
- 1,1,1-Tris(mercaptomethyl)undecane (CAS 850873-54-0)
- Trimethoxy(7-oxabicyclo[4.1.0]heptan-3-yl)silane (CAS 17139-83-2)
- 2-Methyl-4,6-Bis(Octylsulfanylmethyl)Phenol (CAS 110553-27-0)
- 4-Bromo-6-(difluoromethyl)-5-fluoronicotinaldehyde (CAS 1806059-48-2)
- Dapagliflozin Impurity 99 (CAS CATO-C4X-113899)
- 4-Amino-1-((2R,4S,5R)-4-hydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)pyrimidin-2(1H)-one xhydrochloride (CAS 25203-63-8)
- 4-Chloro-3-nitro-1h-pyrazole-5-carbohydrazide (CAS 1046463-61-9)
- 1-(1H-1,2,4-triazol-1-yl)butan-2-one (CAS 1249221-66-6)
- 2-(2-(Thiophen-2-yl)ethyl)cyclopentan-1-ol (CAS 1342630-13-0)
- Semaglutide Impurity 9 (CAS CATO-C4X-22269)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com