(4-Mercaptobutyl)triphenylphosphonium bromide CAS 168423-31-2
| CAS No. | 168423-31-2 |
| Molecular Formula | C22H24PS |
| Molecular Weight | N/A |
| 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.
(4-Mercaptobutyl)triphenylphosphonium bromide (CAS 168423-31-2), molecular formula C22H24PSBr and molecular weight 431.37 g/mol, is a CATO reference standard with documented purity and traceability.
(4-Mercaptobutyl)triphenylphosphonium bromide (C22H24PSBr) contains sulfur-containing functionality, organophosphorus functionality, bromine substitution, a polycyclic aromatic system. Halogen substitution raises its density and boiling point, its high carbon-to-hydrogen ratio confers good lipid solubility; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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 | C22H24PS Br |
| Molecular Weight | 431.37 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 10.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2005 |
| Halogen Content | Br-containing |
| Sulfur Atoms | 1 |
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