Budesonide Impurity 29 CAS 51372-28-2
| CAS No. | 51372-28-2 |
| Molecular Formula | C25H34O6 |
| Molecular Weight | 430.53 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, Budesonide Impurity 29 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 430.53 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
CATO supplies Budesonide Impurity 29 (CAS 51372-28-2), a pharmacopoeial impurity reference standard (molecular formula C25H34O6, MW 430.53 g/mol) used for the identification and quantification of trace impurities in APIs.
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
As a certified reference material (CRM), Budesonide 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 | C25H34O6 |
| Molecular Weight | 430.53 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1971 |
Related Budesonide Standards
- Budesonide EP Impurity C (CAS 1040085-99-1)
- Budesonide Impurity 48 (CAS 84197-04-7)
- Budesonide Impurity 73 (CAS CATO-C4X-138973)
- Budesonide Impurity 75 (CAS CATO-C4X-138975)
- Budesonide (CAS 51333-22-3)
- (22R)-Budesonide (CAS 51372-29-3)
- Budesonide impurity 42 (CAS CATO-C4X-138942)
- Budesonide Δ-6 Impurity (CAS 109458-75-5)
Recommended Standards
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Why CATO?
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- 130,000+ catalog items in stock, COA supplied with every batch
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