(17Z)-20-Hydroxy-3,11-dioxopregna-1,4,17(20)-trien-21-al CAS 118724-35-9
| CAS No. | 118724-35-9 |
| Molecular Formula | C21H24O4 |
| Molecular Weight | 340.41 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 340.41 g/mol gives (17Z)-20-Hydroxy-3,11-dioxopregna-1,4,17(20)-trien-21-al distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
(17Z)-20-Hydroxy-3,11-dioxopregna-1,4,17(20)-trien-21-al (CAS 118724-35-9) is a high-purity analytical reference standard with the molecular formula C21H24O4 and a molecular weight of 340.41 g/mol.
(17Z)-20-Hydroxy-3,11-dioxopregna-1,4,17(20)-trien-21-al (C21H24O4) contains a flavonoid core, a hydroxyl group, an ether linkage. Its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 | C21H24O4 |
| Molecular Weight | 340.41 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
Related Z Standards
- (-)-(3S)-3-Hydroxy Quinine (CAS 78549-61-8)
- (3R)-3-Hydroxy Quinidine (CAS 60761-51-5)
- Benzyl 4-hydroxy-4-((phenylamino)methyl)piperidine-1-carboxylate (CAS 77211-76-8)
- (3R)-3-Hydroxy Quinine (CAS 128241-59-8)
- 4-((2-Hydroxy-3-methoxybenzylidene)amino)-3-(m-tolyl)-1H-1,2,4-triazole-5(4H)-thione (CAS 478255-55-9)
- 4-((4-Hydroxy-3-methoxybenzylidene)amino)-3-(m-tolyl)-1H-1,2,4-triazole-5(4H)-thione (CAS 478255-97-9)
- (3S)-3-Hydroxy Quinidine (CAS 53467-23-5)
- N1-(2-Hydroxy-2-methyl-4-(methylthio)butyl)-N2-(2-methoxybenzyl)oxalamide (CAS 1396781-53-5)
Recommended Standards
- 2-(Methoxymethyl)-3,4,5-triphenylfuran (CAS 106241-00-3)
- 2-(Allylthio)-1-(4-fluorophenyl)-5-(4-methoxyphenyl)-1H-imidazole (CAS 1206991-46-9)
- 1,2:4,5-Biscyclohexylidene DL-myo-Inositol (CAS 104873-71-4)
- (Naphthalene-1,4-diylbis(3,1-phenylene))dimethanol (CAS 1349708-87-7)
- 4-(12,14-Dioxo-9,10-dihydro-9,10-[3,4]epipyrroloanthracen-13-yl)-N-(3-(trifluoromethyl)phenyl)benzamide (CAS 956573-74-3)
- 1-(4-(3,5-Dimethylisoxazol-4-yl)furan-2-yl)propan-1-amine (CAS 791776-83-5)
- 5-(2-Methoxybenzylidene)-2-thioxo-1,3-thiazolidin-4-one (CAS 73855-60-4)
- N-Isobutyl-3-nitroquinolin-4-amine (CAS 99009-85-5)
- n-(3-Fluoro-4-methoxybenzyl)cyclopropanamine (CAS 1094353-65-7)
- 5-Methoxy-6-morpholinopyrimidin-4-amine (CAS 1518841-49-0)
- Ethyl 2-bromo-6-methylnicotinate (CAS 1227502-98-8)
- 3-Nitro-4-((3-(trifluoromethyl)benzyl)thio)benzaldehyde (CAS 885950-56-1)
- 9-(4-Propylcyclohexyl)-9,10-dihydro-8H-dinaphtho[2,1-f:1',2'-h][1,5]dioxonine (CAS 477327-64-3)
- Liraglutide(8-31)TFA Salt (CAS CATO-C4X-19922)
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