Bis(2-ethylphenyl)phosphine oxide CAS 1003879-42-2
| CAS No. | 1003879-42-2 |
| Molecular Formula | C16H19OP |
| Molecular Weight | 258.30 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to organophosphorus functionality, a hydroxyl group, an ether linkage, a polycyclic aromatic system, Bis(2-ethylphenyl)phosphine oxide is typically off-white to pale yellow low-melting solid. Its solid-state physicochemical attributes — including a molecular weight of 258.30 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
CATO supplies Bis(2-ethylphenyl)phosphine oxide (CAS 1003879-42-2), a certified reference material (molecular formula C16H19OP, MW 258.30 g/mol) for analytical method development and quality control.
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 | C16H19OP |
| Molecular Weight | 258.30 g/mol |
| 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) | 7.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1988 |
Related Bis Standards
- 2-(1-(4-Ethylphenyl)-3,5-dimethyl-1H-pyrazol-4-yl)acetic acid (CAS 1267282-75-6)
- 2-(4-Ethylphenyl)-5-(2-hydroxyethyl)-6-methylpyrimidin-4(3H)-one (CAS 866144-73-2)
- 4-(4-Ethylphenyl)-3,4-dihydrofuro[3,4-d]pyrimidine-2,5(1H,7H)-dione (CAS 1707603-59-5)
- 2-[(1E)-2-(4-Ethylphenyl)ethenyl]-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS 870717-91-2)
- 5-Ethyl-2-((4-ethylphenyl)amino)-6-methylpyrimidin-4-ol (CAS 1306739-04-7)
- N-(4-Ethylphenyl)-N-(methylsulfonyl)glycine (CAS 530107-85-8)
- methyl 1-[(4-ethylphenyl)methyl]-5-methyl-1H-1,2,3-triazole-4-carboxylate (CAS 1803605-03-9)
- (2E)-1-(4-Ethylphenyl)-3-(5-methylthiophen-2-yl)prop-2-en-1-one (CAS 1354941-10-8)
Recommended Standards
- Fluenetil (CAS 4301-50-2)
- n-(4-Cyanophenyl)-4-ethyl-1,2,3-thiadiazole-5-carboxamide (CAS 1031072-43-1)
- Ethofumesate-2-hydroxy (CAS 26322-82-7)
- 6-Hydroxy-3-methyl-8-phenyl-3,7-dihydro-2H-purine-2-thione (CAS 103258-00-0)
- 1-(4-(4-Methoxyphenyl)-1-phenylpyrrolidin-3-yl)ethan-1-one (CAS 400088-50-8)
- 2-[(3-bromo-4-methylphenyl)methyl]-3-hydroxypropanenitrile (CAS 1909316-52-4)
- 1-(3-Azetidinyl)-4-ethylpiperazine Trihydrochloride (CAS 2138272-65-6)
- 3-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-1-(tert-butoxycarbonyl)azetidine-3-carboxylic acid (CAS 1380327-51-4)
- N-(4-Bromo-3-cyclopropoxyphenyl)methanesulfonamide (CAS 1243457-07-9)
- 5-Methoxy-1,2,3,4-tetrahydronaphthalen-2-ol (CAS 32920-08-4)
- 2-(4-Amino-3-methoxyphenyl)-2-methylpropanenitrile (CAS 1067192-49-7)
- 5-chloro-2-fluoro-4-nitrobenzene-1-sulfonyl chloride (CAS 1803605-95-9)
- 4,5,6,7-tetrabromo-N,N-dimethyl-1H-benzo[d]imidazol-2-amine (CAS 749234-11-5)
- Retatrutide (CAS 2381089-83-2)
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