Beclomethasone dipropionate Impurity 29 CAS CATO-C4X-147429
| CAS No. | CATO-C4X-147429 |
| Molecular Formula | C22H28O5 |
| Molecular Weight | 372.45 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Beclomethasone dipropionate Impurity 29 is closely related to a flavonoid core, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Beclomethasone dipropionate Impurity 29 (CAS CATO-C4X-147429) is a certified pharmaceutical impurity reference standard with the molecular formula C22H28O5 and a molecular weight of 372.45 g/mol.
Structurally, Beclomethasone dipropionate Impurity 29 (C22H28O5) contains a flavonoid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 9.0, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 372.45 g/mol, it falls into the moderately-high-molecular-weight range. 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).
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), Beclomethasone dipropionate Impurity 29 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 | C22H28O5 |
| Molecular Weight | 372.45 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Beclomethasone Standards
- Beclomethasone dipropionate Impurity 31 (CAS CATO-C4X-147431)
- Beclomethasone-Δ17,20 21-Aldehyde(E/Z Mixture) (CAS 1174035-77-8&1174035-80-3)
- Beclomethasone (CAS CATO-C4X-147422)
- Beclomethasone (CAS 4419-39-0)
- Beclomethasone-d5 (CAS 1263143-48-1)
- Beclomethasone dipropionate Impurity 40 (CAS CATO-C4X-147440)
- Beclomethasone dipropionate Impurity 23 (CAS CATO-C4X-147423)
- Beclomethasone dipropionate Impurity 41 (CAS CATO-C4X-147441)
Recommended Standards
- Betamethasone Impurity 2 (CAS CATO-C4X-14372)
- Beclometasone Impurity 39 (CAS CATO-C4X-147439)
- Betamethasone Impurity 120 (CAS 82536-56-9)
- Ulipristal Impurity 14 (CAS CATO-C4X-191514)
- Vildagliptin Impurity 69 (CAS CATO-C4X-110069)
- Citalopram EP Impurity F HCl (CAS 1644389-68-3)
- Pretomanid Impurity 25 (CAS CATO-C4X-260625)
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