Podophyllotoxin impurity 7 CAS CATO-C4X-24257
| CAS No. | CATO-C4X-24257 |
| Molecular Formula | C20H18O8 |
| Molecular Weight | 386.35 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Podophyllotoxin impurity 7 (CAS CATO-C4X-24257) is a certified pharmaceutical impurity reference standard with the molecular formula C20H18O8 and a molecular weight of 386.35 g/mol.
Based on its molecular formula C20H18O8, Podophyllotoxin impurity 7 contains a flavonoid core, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 386.35 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).
As a certified reference material (CRM), Podophyllotoxin impurity 7 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 | C20H18O8 |
| Molecular Weight | 386.35 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Podophyllotoxin Standards
- Podophyllotoxin Impurity 1 (CAS 1173-42-8)
- Podophyllotoxin impurity 4 (CAS 138456-91-4)
- Podophyllotoxin 4-Deoxy 5-Bromo 6,7-Dihydroxy (CAS 93108-15-7)
- Podophyllotoxin impurity 5 (CAS 1174-97-6)
- Podophyllotoxin Impurity N2 (CAS 42123-27-3)
- Podophyllotoxin EP Impurity C (CAS 477-49-6)
- Podophyllotoxin Impurity 8 (CAS 16481-54-2)
Recommended Standards
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- Daphnetin (CAS 83327-22-4)
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- Tedizolid Impurity 76 (CAS 171018-17-0)
- Cefamandole Impurity 17 (CAS CATO-C4X-122117)
- [1,1'-Biphenyl]-4-amine hydrochloride (CAS 2113-61-3)
- 2-Ethyl-6-hydroxyquinoxaline-5,8-dione (CAS 61373-05-5)
- 4-amino-6-(pyridazin-4-yl)-1,3,5-triazine-2-thiol (CAS 1564626-56-7)
- Pregabalin Impurity 79 (CAS 105-56-6)
- 4,4,5,5,5-Pentafluoro-1-(4-fluorophenyl)pentane-1,3-dione (CAS 64287-12-3)
- 3-(1,5-dimethyl-1h-pyraZol-4-yl)-3-oxopropanenitrile (CAS 1006485-37-5)
- Fibrinopeptide B (human) (CAS 36204-23-6)
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