Betamethasone Impurity 94 CAS 19784-87-3
| CAS No. | 19784-87-3 |
| Molecular Formula | C22H30O4 |
| Molecular Weight | 358.47 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Betamethasone Impurity 94 (CAS 19784-87-3), a certified reference material (molecular formula C22H30O4, MW 358.47 g/mol) for analytical method development and quality control.
Based on its molecular formula C22H30O4, Betamethasone Impurity 94 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 358.47 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 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.
Physical & Chemical Properties
| Molecular Formula | C22H30O4 |
| Molecular Weight | 358.47 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
Related Betamethasone Standards
- Betamethasone EP Impurity J (CAS 18383-24-9)
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- Betamethasone Impurity 75 (CAS CATO-C4X-143775)
- Betamethasone Impurity 128 (CAS CATO-C4X-1437128)
- Betamethasone Impurity 129 (CAS CATO-C4X-1437129)
- Betamethasone Impurity 50 (CAS 1203841-45-5)
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Recommended Standards
- Tert-butyl 5-methyl-2-(2-oxo-2-phenylethyl)-2,7-diazaspiro[3.5]Nonane-7-carboxylate (CAS 1899102-32-9)
- 1,2-Bis(3,4-dichlorophenyl)ethane-1,2-dione (CAS 74417-18-8)
- Tert-butyl 6-methyl-2-(2-oxo-2-phenylethyl)-2,7-diazaspiro[3.5]Nonane-7-carboxylate (CAS 1899102-31-8)
- 1-Cyclohexyl-N-(2-methoxyethyl)-6-oxo-2-phenylpiperidine-3-carboxamide (CAS 439111-07-6)
- 1-(Methoxymethyl)-5-vinyl-1H-imidazole (CAS 160425-47-8)
- 3-Chloro-1H-indene-2-carbaldehyde (CAS 74812-71-8)
- rac-tert-butyl N-[(3R,4S)-4-(2-fluorophenyl)pyrrolidin-3-yl]carbamate (CAS 1260602-03-6)
- 2-(Difluoromethyl)-5-hydroxy-3-iodopyridine-6-acetonitrile (CAS 1807065-88-8)
- 2-Isocyanatobenzofuran (CAS 179873-62-2)
- 7-Methyl-1H-pyrrolo[3,2-c]pyridine-4-carboxylic acid (CAS 1082041-02-8)
- Methyl 2-bromo-5-(dimethylamino)benzoate (CAS 164513-41-1)
- (3S,4R)-4-fluorotetrahydrofuran-3-ol (CAS 1904093-85-1)
- Boc-Tyr(Ac)-OH (CAS 80971-82-0)
- Tau Peptide (273-284) trifluoroacetate salt (CAS 1663490-91-2)
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