Prednisolone impurity 66 CAS 137759-50-3
| CAS No. | 137759-50-3 |
| Molecular Formula | C25H34O5 |
| Molecular Weight | 414.53 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures Prednisolone impurity 66 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Prednisolone impurity 66 (CAS 137759-50-3) is a certified pharmaceutical impurity reference standard with the molecular formula C25H34O5 and a molecular weight of 414.53 g/mol.
Based on its molecular formula C25H34O5, Prednisolone impurity 66 contains a flavonoid core, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 414.53 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 | C25H34O5 |
| Molecular Weight | 414.53 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1996 |
Related Prednisolone Standards
- Prednisolone impurity 68 (CAS CATO-C4X-173768)
- Prednisolone Impurity 61 (CAS 50718-16-6)
- Prednisolone Impurity 49 (CAS CATO-C4X-173749)
- Prednisolone impurity 67 (CAS 20380-17-0)
- Prednisolone Impurity 27 (CAS 76282-98-9)
- Prednisolone Impurity 69 (CAS 31311-61-2)
- Prednisolone Impurity 16 (CAS CATO-C4X-173716)
- Prednisolone Sodium Phosphate USP Impurity I (CAS CATO-C4X-173738)
Recommended Standards
- Budesonide Impurity 17 (CAS CATO-C4X-138917)
- 19-Hydroxynonadec-2-ene-1,2,3-tricarboxylic acid (CAS 181514-10-3)
- Methylprednisolone Impurity 47 (CAS CATO-C4X-191947)
- D-Arabino-Hex-1-enitol, 1,2-dideoxy-4-O-[3-(2,2-dimethyl-1-oxopropoxy)propyl]-5,6-O-(1-methylethylidene)-, 3-(2,2-dimethylpropanoate) (CAS 933779-87-4)
- Ceftazidime Impurity 23 (CAS 158183-05-2)
- Torasemide impurity 37 (CAS CATO-C4X-183637)
- Butylphthalide Impurity 58 (CAS 172687-90-0)
- 1-(5-Bromo-2-ethoxyphenyl)ethanone (CAS 16602-11-2)
- 7-Methyl-2-(methylamino)pyrido[2,3-d]pyrimidin-6-yl trifluoromethanesulfonate (CAS 1454682-77-9)
- Sulpiride impurity 17 (CAS CATO-C4X-187617)
- 1-vinylcyclohexanol (CAS 1940-19-8)
- Taranabant (1R,2R)stereoisomer (CAS 701977-08-4)
- Methyl 2-(4-bromo-2-chloro-5-methylphenyl)acetate (CAS 1428761-26-5)
- Ephrin-A2-Selective YSA-Peptide (CAS 532441-10-4)
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