Tribenzylphosphine oxide CAS 4538-55-0
| CAS No. | 4538-55-0 |
| Molecular Formula | C21H21OP |
| Molecular Weight | 320.36 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Tribenzylphosphine oxide meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
CATO supplies Tribenzylphosphine oxide (CAS 4538-55-0), a certified reference material (molecular formula C21H21OP, MW 320.36 g/mol) for analytical method development and quality control.
Based on its molecular formula C21H21OP, Tribenzylphosphine oxide contains a steroid core, organophosphorus functionality, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 320.36 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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.
Physical & Chemical Properties
| Molecular Formula | C21H21OP |
| Molecular Weight | 320.36 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| 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) | 11.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
Related Tribenzylphosphine Standards
- Tribenzylphosphine (CAS 7650-89-7)
- Tribenzylphosphine(1,5-cyclooctadiene)[1,3-bis(2,4,6-trimethylphenyl)imidazol-2-ylidene]iridium(I) hexafluorophosphate, min. 98% (CAS 1019853-01-0)
- Tribenzylphosphine(1,5-cyclooctadiene)[1,3-bis(2,4,6-trimethylphenyl)imidazol-2-ylidene]iridium(I) hexafluorophosphate (CAS 1019853-02-1)
Recommended Standards
- tert-Butyl 5-fluoro-2-oxospiro[indoline-3,4-piperidine]-1-carboxylate (CAS 866028-06-0)
- Tris(4-methylphenyl)phosphine Oxide (CAS 797-70-6)
- tert-Butyl 4-fluoro-2-oxospiro[indoline-3,4'-piperidine]-1'-carboxylate (CAS 2197055-58-4)
- 2-Amino-5-(4-methoxyphenylcarbamoyl)-4-methyl thiophene-3-carboxylic acid methyl ester 2-amino-5-(4-methoxy-phenylcarbamoyl)-4-methyl-thiophene-3-carboxylic acid methyl ester 2-amino-5-(4-methoxyphenylcarbamoyl)-4-methylthiophene-3-carboxylic acid methyl ester 350996-96-2 methyl 2-amino-5-([(4-methoxyphenyl)amino]-carbonyl)-4-methylthiophene-3-carboxylate (CAS 350996-96-2)
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