(3-Ethynylphenyl)dimethylphosphine oxide CAS 2287286-68-2
| CAS No. | 2287286-68-2 |
| Molecular Formula | C10H11OP |
| Molecular Weight | 178.17 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C10H11OP, (3-Ethynylphenyl)dimethylphosphine oxide contains organophosphorus functionality, a hydroxyl group, an ether linkage, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 178.17 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.
(3-Ethynylphenyl)dimethylphosphine oxide (CAS 2287286-68-2) is a high-purity analytical reference standard with the molecular formula C10H11OP and a molecular weight of 178.17 g/mol.
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.
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 | C10H11OP |
| Molecular Weight | 178.17 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | Stable under recommended storage conditions |
| Degree of Unsaturation (DBE) | 5.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1999 |
Related Ethynylphenyl Standards
- 3-(4-Ethynylphenyl)pyridine (CAS 1072448-42-0)
- 2-(4-Ethynylphenyl)pyridine (CAS 871012-92-9)
- (3-ethynylphenyl)thiourea (CAS 883949-25-5)
- S-(4-Ethynylphenyl) ethanethioate (CAS 170159-24-7)
- 3-(4-ethynylphenyl)oxetan-3-ol (CAS 1678528-85-2)
- (3-Ethynylphenyl)glycine (CAS 1040074-05-2)
- 1-(2-Ethynylphenyl)cyclobutane-1-carbonitrile (CAS 2228644-48-0)
- (4-Ethynylphenyl)trimethylsilane (CAS 16116-92-0)
Recommended Standards
- (2,4,5-Trifluorophenyl)methanethiol (CAS 886498-39-1)
- 1-Phenyl-2,3-dihydrophosphole 1-oxide (CAS 703-03-7)
- 1-(4-Fluorophenyl)-1H-1,2,4-triazol-3-amine (CAS 1858445-20-1)
- 2,4,5-Trifluorothioanisole (CAS 54378-74-4)
- N-Methyl-1-(5-methyl-1H-indol-3-yl)methanamine formate (CAS 1185435-02-2)
- 2-(Tert-butoxy)-5-chloropyrazine (CAS 1060803-81-7)
- Boc-β-HoAsn-OH (CAS 336182-03-7)
- 1-Methyl-5-(trifluoromethyl)-1H-pyrazol-4-amine (CAS 161038-64-8)
- 1H-pyrrolo[2,3-c]pyridine-1-sulfonamide (CAS 2172947-77-0)
- Epinastine Impurity 8 (CAS 58821-75-3)
- 4-(7-Methyloctyl)phenol (CAS 24518-48-7)
- 3,5-Dimethyl-N-propylcyclohexan-1-amine (CAS 1343112-63-9)
- 2-((5-Phenylthieno[2,3-d]pyrimidin-4-yl)thio)benzoic acid (CAS 744203-98-3)
- Semaglutide impurity 208 (CAS CATO-C4X-2226208)
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