Betamethasone impurity 97 CAS 1150311-95-7
| CAS No. | 1150311-95-7 |
| Molecular Formula | C22H29FO5 |
| Molecular Weight | 392.46 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Betamethasone impurity 97 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.
CATO supplies Betamethasone impurity 97 (CAS 1150311-95-7), a pharmacopoeial impurity reference standard (molecular formula C22H29FO5, MW 392.46 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C22H29FO5, Betamethasone impurity 97 contains a flavonoid core, a hydroxyl group, an ether linkage, fluorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 392.46 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).
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.
Physical & Chemical Properties
| Molecular Formula | C22H29FO5 |
| Molecular Weight | 392.46 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1989 |
| Halogen Content | F-containing |
Related Betamethasone Standards
- Betamethasone Impurity 22 (CAS 2990-65-0)
- Betamethasone EP Impurity H (CAS 185613-71-2)
- Betamethasone Impurity 117 (CAS CATO-C4X-1437117)
- Betamethasone Impurity 145 (CAS CATO-C4X-1437145)
- Betamethasone Impurity 34(Mixture of Diastereomers) (CAS 1249-19-0)
- Betamethasone impurity 71 (CAS 37926-76-4)
- Betamethasone EP Impurity I (CAS 185613-69-8)
- Betamethasone impurity 98 (CAS CATO-C4X-143798)
Recommended Standards
- Fluticasone Impurity 56 (CAS CATO-C4X-165056)
- Fluorometholone Impurity 8 (CAS CATO-C4X-19338)
- Betamethasone (CAS 378-44-9)
- Paramethasone (CAS 53-33-8)
- Apixaban Impurity 114 (CAS CATO-C4X-1088114)
- Sodium Cromoglicate Impurity 16 (CAS CATO-C4X-201116)
- Diazoxide impurity 9 (CAS CATO-C4X-19529)
- 4-Aminomethylphenylacetic acid (CAS 1200-05-1)
- 2-(4-Pyridyl)-2-propylamine (CAS 566155-76-8)
- Mono[2-(carboxymethyl)hexyl] Phthalate-d4 (CAS 1794811-42-9)
- Ethyl 1-benzoyl-5-methyl-5-vinylpyrazolidine-3-carboxylate (CAS 582322-46-1)
- Thonningianin A (CAS 271579-11-4)
- Butenafine Impurity 13 (CAS 759458-92-9)
- Semaglutide impurity 248 (CAS CATO-C4X-2226248)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com