Etoposide EP Impurity Q CAS 153975-26-9
| CAS No. | 153975-26-9 |
| Molecular Formula | C21H16O7 |
| Molecular Weight | 380.35 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Owing to a flavonoid core, a hydroxyl group, an ether linkage, Etoposide EP Impurity Q is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 380.35 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
CATO supplies Etoposide EP Impurity Q (CAS 153975-26-9), a pharmacopoeial impurity reference standard (molecular formula C21H16O7, MW 380.35 g/mol) used for the identification and quantification of trace impurities in APIs.
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.
As a certified reference material (CRM), Etoposide EP Impurity Q 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.
Physical & Chemical Properties
| Molecular Formula | C21H16O7 |
| Molecular Weight | 380.35 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| Storage | Store at 2-8°C, 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.) | 2000 |
Related Etoposide Standards
- Etoposide EP Impurity P (CAS 117669-31-5)
- Etoposide EP Impurity L (CAS 40505-27-9)
- Etoposide Impurity 29 (CAS CATO-C4X-202429)
- Etoposide EP Impurity E (CAS 6559-91-7)
- Etoposide EP Impurity J (CAS 118356-05-1)
- Etoposide EP Impurity M (CAS 518-28-5)
- Etoposide Impurity 36 (CAS 89709-04-6)
- Etoposide Impurity 25 (CAS CATO-C4X-202425)
Recommended Standards
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- Lomefloxacin impurity 13 (CAS CATO-C4X-207313)
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Why CATO?
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