6a-Fluoro-16a-methyl-1,4,9(11)-pregnatriene-17a,21-diol-3,20-dione 21-acetate CAS 19788-77-3
| CAS No. | 19788-77-3 |
| Molecular Formula | C24H29FO5 |
| Molecular Weight | 416.48 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 416.48 g/mol gives 6a-Fluoro-16a-methyl-1,4,9(11)-pregnatriene-17a,21-diol-3,20-dione 21-acetate distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
6a-Fluoro-16a-methyl-1,4,9(11)-pregnatriene-17a,21-diol-3,20-dione 21-acetate (CAS 19788-77-3), molecular formula C24H29FO5 and molecular weight 416.48 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a flavonoid core, a hydroxyl group, an ether linkage, fluorine substitution, 6a-Fluoro-16a-methyl-1,4,9(11)-pregnatriene-17a,21-diol-3,20-dione 21-acetate is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 416.48 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 6a-Fluoro-16a-methyl-1,4,9(11)-pregnatriene-17a,21-diol-3,20-dione 21-acetate 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.
Physical & Chemical Properties
| Molecular Formula | C24H29FO5 |
| Molecular Weight | 416.48 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Halogen Content | F-containing |
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Recommended Standards
- m-PEG3-Sulfone-PEG3-acid (CAS 1919045-04-7)
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- 1-[(2'-Cyano-1,1'-biphenyl-4-yl)methyl]-2-ethoxy-d5-7-benzimidazolecarboxylic Acid Methyl Ester (CAS 1794783-33-7)
- DDRI-18 (CAS 4402-18-0)
- ±-Catechin-2,3,4-<SUP>13</SUP>C<SUB>3</SUB> (CAS 1261254-33-4)
- n-Isopropyl-2-((3-nitrophenyl)amino)acetamide (CAS 923243-01-0)
- 3-[(4-Chlorobenzenesulfonyl)methyl]-4-nitro-N-[(1E)-{[2-oxo-2-(4-phenylpiperazin-1-yl)ethoxy]amino}methylidene]benzamide (CAS 478262-07-6)
- N-(3-methoxyphenyl)-N-(phenylsulfonyl)glycine (CAS 425627-03-8)
- Pyrazolo[1,5-a][1,3,5]triazine-2,4-diamine (CAS 71680-61-0)
- (4S,4'S)-4,4'-Diethyl-1,1'-di-p-tolyl-4,4',5,5'-tetrahydro-1H,1'H-2,2'-biimidazole (CAS 2374958-81-1)
- 4-(1H-pyrrol-1-yl)pyridin-2-amine (CAS 1314354-37-4)
- Kif15-in-2 (CAS 672926-33-9)
- Tetrakis(2,4-pentanedionato)titanium(IV) (ca. 63% in Isopropyl Alcohol) (CAS 17501-79-0)
- Semaglutide Impurity 131 (CAS 2618647-80-4)
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