(1,3-Dihydro-7-nitro-5-phenyl-2H-1,4-benzodiazepin-2-onato-κN1)(triphenylphosphine)gold CAS 128493-73-2
| CAS No. | 128493-73-2 |
| Molecular Formula | C33H25AuN3O3P |
| Molecular Weight | 739.51 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of (1,3-Dihydro-7-nitro-5-phenyl-2H-1,4-benzodiazepin-2-onato-κN1)(triphenylphosphine)gold is closely related to a nitrogen-containing heterocyclic scaffold, an amide group, a phosphonate group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
(1,3-Dihydro-7-nitro-5-phenyl-2H-1,4-benzodiazepin-2-onato-κN1)(triphenylphosphine)gold (CAS 128493-73-2), molecular formula C33H25AuN3O3P and molecular weight 739.51 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, (1,3-Dihydro-7-nitro-5-phenyl-2H-1,4-benzodiazepin-2-onato-κN1)(triphenylphosphine)gold (C33H25AuN3O3P) contains a nitrogen-containing heterocyclic scaffold, an amide group, a phosphonate group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 23.0, corresponding to approximately 23 ring(s) or double-bond equivalent(s). With a molecular weight of 739.51 g/mol, it falls into the high-molecular-weight range. 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.
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 | C33H25AuN3O3P |
| Molecular Weight | 739.51 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 23.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1993 |
| Nitrogen Atoms | 3 |
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Recommended Standards
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- Fumonisin B2-13C34 (CAS 1217481-36-1)
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- N1-cyclohexyl-N3,N3-diethylpropane-1,3-diamine (CAS 1019625-50-3)
- [(2-Bromo-6-chlorophenyl)methyl]diethylamine (CAS 1881329-75-4)
- 1,6-Dinitroanthracene-9,10-dione (CAS 1604-42-8)
- 2-(2-Bromo-5-fluoro-4-nitrophenoxy)-1,3-difluoro-5-(trifluoromethyl)benzene (CAS 2244087-50-9)
- (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-2-(pyridin-4-yl)acetic acid (CAS 1228565-81-8)
- 4-Bromo-6-nitro-1,2-dihydro-3H-indazol-3-one (CAS 885518-63-8)
- 3-(4-Aminobenzyl)-5,5-dimethylimidazolidine-2,4-dione (CAS 789470-91-3)
- 1-(2-Chloro-4-fluorobenzyl)-3-isothiocyanato-1h-pyrazole (CAS 1004194-41-5)
- Semaglutide impurity 258 (CAS CATO-C4X-2226258)
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