Budesonide 17,21-Diacetyloxy Impurity CAS 17652-24-3
| CAS No. | 17652-24-3 |
| Molecular Formula | C25H32O7 |
| Molecular Weight | 444.52 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Budesonide 17,21-Diacetyloxy Impurity 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.
Budesonide 17,21-Diacetyloxy Impurity (CAS 17652-24-3) is a high-purity analytical reference standard with the molecular formula C25H32O7 and a molecular weight of 444.52 g/mol.
Structurally, Budesonide 17,21-Diacetyloxy Impurity (C25H32O7) contains a flavonoid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 10.0, corresponding to approximately 10 ring(s) or double-bond equivalent(s). With a molecular weight of 444.52 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 is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
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 | C25H32O7 |
| Molecular Weight | 444.52 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
Related Budesonide Standards
- Budesonide Impurity 22(Mixture of Diastereomers) (CAS CATO-C4X-138922)
- Budesonide impurity 45 (CAS 3517-49-5)
- Budesonide Impurity 76 (CAS CATO-C4X-138976)
- Budesonide EP Impurity I (CAS 113930-13-5)
- Budesonide Impurity 37 (CAS 95943-95-6)
- Budesonide-d8 (Mixture of Diastereomers) (CAS 1105542-94-6)
- Budesonide d6 (CAS 1134189-63-1)
- Budesonide Impurity 66 (CAS CATO-C4X-138966)
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