Quetiapine Impurity 55 CAS 54920-98-8
| CAS No. | 54920-98-8 |
| Molecular Formula | C13H11NO2S |
| Molecular Weight | 245.30 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Quetiapine Impurity 55 (CAS 54920-98-8) is a certified pharmaceutical impurity reference standard with the molecular formula C13H11NO2S and a molecular weight of 245.30 g/mol.
The molecular framework of Quetiapine Impurity 55 (C13H11NO2S) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
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 | C13H11NO2S |
| Molecular Weight | 245.30 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1972 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Quetiapine Standards
- Quetiapine Impurity 32 (CAS 13745-86-3)
- Quetiapine Impurity N2 (CAS 20290-48-6)
- Quetiapine Impurity 61 (CAS 65141-02-8)
- Quetiapine impurity 83 (CAS 2101854-40-2)
- Quetiapine Impurity 58 (CAS CATO-C4X-124458)
- Quetiapine Impurity SF (CAS 22871-33-6)
- Quetiapine Impurity 54 (CAS 4171-83-9)
- Quetiapine Impurity 26 (CAS 13509-33-6)
Recommended Standards
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- Olaparib Impurity 163 (CAS 1460272-52-9)
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- Emtricitabine Impurity 16 (CAS 764659-79-2)
- 2-(Pyridazin-3-yl)acetic acid (CAS 933734-89-5)
- 3-Amino-1,4,5-trimethyl-1H-pyrrole-2-carboxylic acid (CAS 749162-26-3)
- (6-(Indolin-1-yl)-4-methylpyridin-3-yl)methanol (CAS 1355233-19-0)
- Semaglutide impurity 38 (CAS CATO-C4X-222638)
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