Betamethasone Impurity 66 CAS 90039-90-0
| CAS No. | 90039-90-0 |
| Molecular Formula | C20H24O2 |
| Molecular Weight | 296.40 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C20H24O2, Betamethasone Impurity 66 contains a steroid core, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 296.40 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).
Betamethasone Impurity 66 (CAS 90039-90-0), molecular formula C20H24O2 and molecular weight 296.40 g/mol, is a CATO reference standard with documented purity and traceability.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures Betamethasone 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.
Physical & Chemical Properties
| Molecular Formula | C20H24O2 |
| Molecular Weight | 296.40 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| 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.) | 1982 |
Related Betamethasone Standards
- Betamethasone Impurity 126 (CAS 90039-84-2)
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- Betamethasone Impurity 10 (CAS 38680-83-0)
- Betamethasone Impurity 78 (CAS CATO-C4X-143778)
- Betamethasone Impurity 81 (CAS CATO-C4X-143781)
- Betamethasone EP Impurity C (CAS 13504-15-9)
- Betamethasone EP Impurity F (CAS 330157-04-5)
- Betamethasone Impurity 94 (CAS 19784-87-3)
Recommended Standards
- 9-Isopropyl-10-phenylanthracene (CAS 76843-18-0)
- Diethylstilbestrol Dimethyl Ether (CAS 7773-34-4)
- 9-Benzyl-1,4-dimethylanthracene (CAS 56181-32-9)
- ethyl 3-((S)-1-((1S,3aR,7aR)-7a-methyl-4-oxooctahydro-1H-inden-1-yl)ethoxy)propanoate (CAS 413571-28-5)
- 2-(Aminomethyl)-5-(difluoromethyl)-3-hydroxypyridine-6-methanol (CAS 1806880-35-2)
- 1-(5-Chloro-4-methylpyridin-2-yl)ethan-1-one (CAS 1256806-22-0)
- 5-[(2-methoxyphenyl)sulfamoyl]-2-methylbenzoic acid (CAS 327088-39-1)
- Methyl 6-hydroxy-5-oxo-1,2,3,5-tetrahydroindolizine-8-carboxylate (CAS 185198-42-9)
- 3-Bromo-4-chloro-2-methyl-1H-pyrrolo[2,3-b]pyridine (CAS 744209-66-3)
- 2-Amino-3-bromo-6-fluoro-5-iodobenzonitrile (CAS 1000577-79-6)
- 1-Benzyl-5-(4-methyl-5-sulfanyl-4H-1,2,4-triazol-3-yl)-1,2-dihydropyridin-2-one (CAS 242472-11-3)
- 5-Hydroxychroman-4-one (CAS 13849-19-9)
- 5-Methoxy-2-(methoxycarbonyl)benzoic acid (CAS 681469-62-5)
- FLAG Epitope Peptide (CAS 98849-88-8)
Why CATO?
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