21-Dehydro Flumethasone CAS 65751-65-7
| CAS No. | 65751-65-7 |
| Molecular Formula | C22H26F2O5 |
| Molecular Weight | 408.44 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to a flavonoid core, a hydroxyl group, an ether linkage, fluorine substitution, 21-Dehydro Flumethasone is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 408.44 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
CATO supplies 21-Dehydro Flumethasone (CAS 65751-65-7), a certified reference material (molecular formula C22H26F2O5, MW 408.44 g/mol) for analytical method development and quality control.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C22H26F2O5 |
| Molecular Weight | 408.44 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1975 |
| Halogen Content | F-containing |
Related Dehydro Standards
- 21-Dehydro Clocortolone (CAS 61744-29-4)
- Dehydro-δ-tocopherol (CAS 802909-72-4)
- 6,7-Dehydro Prednisolone 21-Acetate (CAS 2427-45-4)
- 11-Dehydro-6β,17-dihydroxy-corticosterone 21-Acetate (CAS 13096-52-1)
- Dehydro diosgenin (CAS 1672-65-7)
- Dehydro Nisoldipine-d7 (CAS 1329836-20-5)
- (3β)-7-Dehydro Cholesterol-d7 (CAS 388622-58-0)
- 21-Dehydro Betamethasone (CAS 61558-12-1)
Recommended Standards
- 2,3,6,7,10,11-Hexamethoxytriphenylene (CAS 808-57-1)
- Eicosane, 1-iodo (CAS 34994-81-5)
- 2-((3-Benzyl-4,8,8-trimethyl-2-oxo-9,10-dihydro-2H,8H-pyrano[2,3-f]chromen-5-yl)oxy)acetic acid (CAS 933607-10-4)
- Pentaerythritoltetramethacrylate (CAS 3253-41-6)
- 2-((3,4-Dimethylcyclohexyl)amino)-N,N-dimethylacetamide (CAS 1342347-81-2)
- (E)-2-(2-(Benzo[d][1,3]dioxol-5-yl)vinyl)-6-chloroquinazolin-4(3H)-one (CAS 922189-63-7)
- (2E,4E,6E)-2,7-Dimethylocta-2,4,6-trienedial (CAS 5056-17-7)
- 3-Methoxy-4-methyl-4,5,6,7-tetrahydroisoxazolo[4,5-c]pyridine (CAS 113932-54-0)
- 4-Azaindole-3-carboxylic acid, 97% (CAS 860496-20-4)
- 3-Cyclohexyl-7-iodo-[1,2,4]triazolo[4,3-a]pyridine (CAS 1057393-73-3)
- 1-Ethyl-6-hydroxy-4-methyl-2-oxo-1,2-dihydropyridine-3-carbonitrile (CAS 28141-13-1)
- Cobalt(II) perchlorate hexahydrate (CAS 13478-33-6)
- n-Propyl-d7 Alcohol (CAS 102910-31-6)
- Semaglutide impurity 211 (CAS CATO-C4X-2226211)
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