Etoposide EP Impurity B CAS 100007-56-5
| CAS No. | 100007-56-5 |
| Molecular Formula | C29H32O13 |
| Molecular Weight | 588.56 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Etoposide EP Impurity B (CAS 100007-56-5) is a certified pharmaceutical impurity reference standard with the molecular formula C29H32O13 and a molecular weight of 588.56 g/mol.
Etoposide EP Impurity B (C29H32O13) contains a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
Physical & Chemical Properties
| Molecular Formula | C29H32O13 |
| Molecular Weight | 588.56 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 14.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
Related Etoposide Standards
- Etoposide (CAS 33419-42-0)
- Etoposide EP Impurity C (CAS 100007-53-2)
- Etoposide impurity 22 (CAS 153975-25-8)
- Etoposide Impurity 30 (CAS CATO-C4X-202430)
- Etoposide EP Impurity I (CAS 111712-42-6)
- Etoposide 3,4-Quinone (CAS 105016-65-7)
- Etoposide EP Impurity D (CAS 23363-35-1)
- Etoposide Impurity 23 (CAS 101648-63-9)
Recommended Standards
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