(7-Methoxy-3-oxo-1,3-dihydroisobenzofuran-1-yl)triphenylphosphonium bromide CAS 887644-98-6
| CAS No. | 887644-98-6 |
| Molecular Formula | C27H22O3P |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to a steroid core, a phosphonate group, a hydroxyl group, an ether linkage, bromine substitution, (7-Methoxy-3-oxo-1,3-dihydroisobenzofuran-1-yl)triphenylphosphonium bromide is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 505.35 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.
(7-Methoxy-3-oxo-1,3-dihydroisobenzofuran-1-yl)triphenylphosphonium bromide (CAS 887644-98-6), molecular formula C27H22O3PBr and molecular weight 505.35 g/mol, is a CATO reference standard with documented purity and traceability.
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 | C27H22O3P Br |
| Molecular Weight | 505.35 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 16.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | Br-containing |
Related Methoxy Standards
- 1-(2-Methoxy-6-(methylsulfonyl)phenyl)piperazine (CAS 1000018-42-7)
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- 6-Methoxy-4-nitro-1H-indazole (CAS 1000341-08-1)
Recommended Standards
- methyl 2,2-difluoro-3-phenylpropanoate (CAS 109872-99-3)
- 2-Isopropyl-5-methyl-5-phenoxy-1,3,2-dioxaborinane (CAS 89561-49-9)
- Ethyl 2-(2-allyl-6-methoxy-1-oxo-1,2,3,4-tetrahydronaphthalen-2-yl)acetate (CAS 2219339-66-7)
- Benzyl (2-hydroxyethyl)(pentan-3-yl)carbamate (CAS 1303873-21-3)
- [Glp5] Substance P (5-11) (CAS 56104-22-4)
- Ethyl 3-(piperidin-2-yl)propanoate hydrochloride (CAS 7599-21-5)
- [1,2,4]Triazolo[4,3-b]pyridazin-3-ylmethanol (CAS 88277-73-0)
- 5-Chloroisoquinolin-3-ol (CAS 1175272-82-8)
- 1-(1-(1H-Benzo[d]imidazol-2-yl)-2-phenylethyl)-3-(3-cyanophenyl)urea (CAS 1197844-28-2)
- Semaglutide Impurity 140 (CAS CATO-C4X-2226140)
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