D-Homo B Derivative Bethamethasone CAS 1201919-18-7
| CAS No. | 1201919-18-7 |
| Molecular Formula | C22H28FO8P |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO supplies D-Homo B Derivative Bethamethasone (CAS 1201919-18-7), a certified reference material (molecular formula C22H28FO8PNa, MW 493.42 g/mol) for analytical method development and quality control.
D-Homo B Derivative Bethamethasone (C22H28FO8PNa) contains a flavonoid core, a phosphate ester group, a hydroxyl group, an ether linkage, fluorine substitution. Halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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.
Physical & Chemical Properties
| Molecular Formula | C22H28FO8P 2*Na |
| Molecular Weight | 493.42 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | >90% |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 8.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | F-containing |
Related D Standards
- 26-Homo-1,25-dihydroxyvitamin D3 (CAS 105687-81-8)
- Homo Tamsulosin (CAS 1217771-89-5)
- sym-Homo Spermidine TriHCl (CAS 189340-78-1)
- Homo Egonol -β-D-Glucoside (CAS 325791-19-3)
- Homo-α-lipoic Acid (CAS 5616-71-7)
- Homo Sildenafil (CAS 642928-07-2)
- 28-Homo Brassinolide (CAS 82373-95-3)
- sym-Homo Spermidine-d4 Trihydrochloride (Major) (CAS 856869-03-9)
Recommended Standards
- Tert-butyl ((S)-2-(4-carbamoylphenyl)-1-((S)-oxiran-2-yl)ethyl)carbamate (CAS 1217673-66-9)
- 4-(3-Bromo-benzyl)-thiomorpholine 1,1-dioxide (CAS 1249852-46-7)
- Gemcitabine Impurity 30 (CAS 143157-27-1)
- 3-Chloro-5-(3-chlorophenyl)picolinonitrile (CAS 1415226-38-8)
- (R)-2-(Benzofuran-2-carboxamido)-4-methylpentanoic acid (CAS 1309027-50-6)
- (E)-Ajoene (CAS 92284-99-6)
- 4-(Thiophen-2-yl)benzonitrile (CAS 15961-46-3)
- Eltrombopag Impurity 26 (CAS CATO-C4X-119826)
- 5-((4-Morpholino-5-phenylpyridin-2-yl)amino)pyrazine-2-carbonitrile (CAS 1137476-15-3)
- Ganirelix 1-4 peptide (CAS 208599-57-9)
Why CATO?
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