(4-Bromophenyl)diphenylphosphine Oxide CAS 5525-40-6
| CAS No. | 5525-40-6 |
| Molecular Formula | C18H14BrOP |
| Molecular Weight | 357.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO supplies (4-Bromophenyl)diphenylphosphine Oxide (CAS 5525-40-6), a certified reference material (molecular formula C18H14BrOP, MW 357.18 g/mol) for analytical method development and quality control.
Owing to a steroid core, organophosphorus functionality, a hydroxyl group, an ether linkage, bromine substitution, (4-Bromophenyl)diphenylphosphine Oxide is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 357.18 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C18H14BrOP |
| Molecular Weight | 357.18 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; 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.) | 1958 |
| Halogen Content | Br-containing |
Related Bromophenyl Standards
- (3-Bromophenyl)diphenylphosphine oxide (CAS 10212-04-1)
- N-(2-Bromophenyl)-2-nitrobenzenesulfonamide (CAS 10398-64-8)
- N-(4-Bromophenyl)-2-nitrobenzenesulfonamide (CAS 159048-82-5)
- N-(4-Bromophenyl)-4-nitrobenzenesulfonamide (CAS 16937-01-2)
- N-(3-Bromophenyl)-3-nitrobenzenesulfonamide (CAS 18999-21-8)
- N-(3-Bromophenyl)-2-nitrobenzenesulfonamide (CAS 62533-24-8)
- 3-(3-Bromophenyl)-1-(2-(trifluoromethyl)phenyl)propan-1-one (CAS 898760-51-5)
- 3-(3-Bromophenyl)-1-(3-(trifluoromethyl)phenyl)propan-1-one (CAS 898760-54-8)
Recommended Standards
- 2-Fluoro-5-(phenoxycarbonylamino)benzeneboronic acid pinacol ester, 97% (CAS 2096333-70-7)
- 4-Bromo-N-(4-nitrophenyl)benzenesulfonamide (CAS 17648-92-9)
- 3-(Heptafluoropropyl)-4-nitro-5-phenylpyrazole (CAS 244187-06-2)
- 4-(2-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-4-(trifluoromethyl)phenyl)morpholine (CAS 906352-77-0)
- 1-(2-Methylpiperazin-1-yl)-2-phenylethan-1-one (CAS 1240565-46-1)
- (S)-(-)-2-O-Benzylglyceraldehyde (CAS 129492-58-6)
- 5-((4,5-Dihydro-1H-imidazol-2-yl)amino)benzene-1,2,3-triol (CAS 91147-42-1)
- 1,1,3,3,5,5,7,7,9,9,11,11,13,13-Tetradecamethylheptasiloxane (CAS 19095-23-9)
- 3-Bromo-6-hydrazinylpyridazine (CAS 64461-67-2)
- Ethyl 2-bromo-5-chlorothiophene-3-carboxylate (CAS 2091165-96-5)
- 5-(piperidin-1-ylmethyl)-1,2-oxazole-3-carboxylic acid hydrochloride (CAS 1803605-11-9)
- 3-Oxo-2-phenylpropanamide (CAS 65715-14-2)
- Methyl 1-amino-4-bromo-1H-pyrrole-2-carboxylate methanesulfonate (CAS 1400580-12-2)
- D-β-Asp15-Tirzepatide (CAS CATO-CPTD788930)
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