Etoposide Impurity 29 CAS CATO-C4X-202429
| CAS No. | CATO-C4X-202429 |
| Molecular Formula | C21H20O8 |
| Molecular Weight | 400.38 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Etoposide Impurity 29.
Etoposide Impurity 29 (CAS CATO-C4X-202429) is a certified pharmaceutical impurity reference standard with the molecular formula C21H20O8 and a molecular weight of 400.38 g/mol.
Structurally, Etoposide Impurity 29 (C21H20O8) contains a flavonoid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 12.0, corresponding to approximately 12 ring(s) or double-bond equivalent(s). With a molecular weight of 400.38 g/mol, it falls into the moderately-high-molecular-weight range. 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.
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 | C21H20O8 |
| Molecular Weight | 400.38 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Etoposide Standards
- Etoposide EP Impurity L (CAS 40505-27-9)
- Etoposide EP Impurity E (CAS 6559-91-7)
- Etoposide EP Impurity P (CAS 117669-31-5)
- Etoposide EP Impurity J (CAS 118356-05-1)
- Etoposide EP Impurity M (CAS 518-28-5)
- Etoposide EP Impurity Q (CAS 153975-26-9)
- Etoposide Impurity 25 (CAS CATO-C4X-202425)
- Etoposide Impurity 35 (CAS CATO-C4X-202435)
Recommended Standards
- Daunorubicin EP Impurity E (CAS 28008-51-7)
- 3-(1-Methyl-1H-indol-3-yl)-4-(1-methyl-6-nitro-1H-indol-3-yl)-1H-pyrrole-2,5-dione (CAS 125313-92-0)
- Minocycline impurity 75 (CAS 803616-67-3)
- 2-(4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-imidazole (CAS 1269646-23-2)
- Tolvaptan Impurity 43 (CAS CATO-C4X-195543)
- Vitamin A Impurity 16 (CAS CATO-C4X-218716)
- Etrasimod Impurity 59 (CAS CATO-C4X-321459)
- Methyl 2-formyl-4,6-dimethoxybenzoate (CAS 17846-90-1)
- 1,3-Dibutylxanthine (CAS 2850-36-4)
- N-Acetyl-S-(N-methylcarbamoyl)-L-cysteine (CAS 103974-29-4)
- 3,6-Dichloro-2-methylcinnamic acid (CAS 1807417-17-9)
- 7-Bromo-2,3-dihydrobenzo[b][1,4]dioxin-6-ol (CAS 1216307-76-4)
- Tretinoin Impurity 9 (CAS 15498-86-9)
- Semaglutide impurity 33 (CAS CATO-C4X-222633)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com