Methyltriphenylphosphonium bromide CAS 1779-49-3
| CAS No. | 1779-49-3 |
| Molecular Formula | C19H18P |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 357.23 g/mol gives Methyltriphenylphosphonium bromide distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Methyltriphenylphosphonium bromide (CAS 1779-49-3), molecular formula C19H18PBr and molecular weight 357.23 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C19H18PBr, Methyltriphenylphosphonium bromide contains organophosphorus functionality, bromine substitution, a polycyclic aromatic system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 357.23 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C19H18P Br |
| Molecular Weight | 357.23 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°C, 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.) | 1957 |
| Halogen Content | Br-containing |
Related Methyltriphenylphosphonium Standards
- Methyltriphenylphosphonium Chloride (CAS 1031-15-8)
- Methyltriphenylphosphonium methylcarbonate (CAS 1067966-63-5)
- Methyltriphenylphosphonium chloride 57283-72-4 METHYLTRIPHENYLPHOSPHONIUM CHLORIDE;PHOSPHONIUM, METHYLTRIPHENYL-, CHLORIDE SC10086 (CAS 57283-72-4)
- Methyltriphenylphosphonium Iodide-13C (CAS 81826-67-7)
Recommended Standards
- (3-Methyl-6-(trifluoromethyl)imidazo[2,1-b]thiazol-5-yl)methanol (CAS 1823869-36-8)
- 2,7-Dimethyloctane-3,6-dione (CAS 51513-41-8)
- (3R,4S)-3-azido-4-methoxyoxolane (CAS 1807887-96-2)
- Citalopram EP Impurity F HBr (CAS 479065-02-6)
- N-(5-amino-2-methylphenyl)-2-iodobenzamide (CAS 926208-44-8)
- 2-Bromo-5-iodo-4-methylpyridine (CAS 942206-07-7)
- Dalbavancin Nucleus A40926(Mixture) (CAS 102961-72-8)
- Tri(2-thienyl)phosphine (CAS 24171-89-9)
- 1-Bromo-2-oxo-6,9,12,15,18,21-hexaoxa-3-azatetracosan-24-oic acid (CAS 1609108-71-5)
- Peptide-GMF (CAS CATO-CPTD788469)
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