17,21-Dihydroxy-pregn-4-ene-3,11,20-trione 3,20-diethylene ketal CAS 881179-77-7
| CAS No. | 881179-77-7 |
| Molecular Formula | C25H36O7 |
| Molecular Weight | 448.55 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 17,21-Dihydroxy-pregn-4-ene-3,11,20-trione 3,20-diethylene ketal (CAS 881179-77-7), a certified reference material (molecular formula C25H36O7, MW 448.55 g/mol) for analytical method development and quality control.
Structurally, 17,21-Dihydroxy-pregn-4-ene-3,11,20-trione 3,20-diethylene ketal (C25H36O7) contains a flavonoid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 8.0, corresponding to approximately 8 ring(s) or double-bond equivalent(s). With a molecular weight of 448.55 g/mol, it falls into the moderately-high-molecular-weight range. 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).
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), 17,21-Dihydroxy-pregn-4-ene-3,11,20-trione 3,20-diethylene ketal 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 | C25H36O7 |
| Molecular Weight | 448.55 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| 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 |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
Related Dihydroxy Standards
- 17,21-Dihydroxy-pregn-5-ene-3,11,20-trione 3,20-Diethylene Ketal (CAS 101524-47-4)
- (7α,12α)-7,12-Dihydroxy-3-oxo-cholest-4-en-26-oic Acid (CAS 136014-52-3)
- 1,2-Dihydroxy-5,8-bis(p-tolylamino)anthracene-9,10-dione (CAS 6636-38-0)
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- 6 β,21-Dihydroxy-Eplerenone (CAS 674781-15-8)
- 5,7-Dihydroxy-2-(4-methoxyphenyl)-6-((2S,3S,4R,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)-4H-chromen-4-one (CAS 4328-19-2)
- 2-(3,4-Dihydroxy-phenyl)-5,7-dihydroxy-3-methoxy-8-((E)-3-methyl-but-2-enyl)-6-(3-methyl-but-2-enyl)-1-benzopyran-4-one 2-(3,4-dihydroxyphenyl)-5,7-dihydroxy-3-methoxy-6,8-bis(3-methylbut-2-enyl)chromen-4-one 99217-70-6 Broussoflavanol B (CAS 99217-70-6)
Recommended Standards
- (3R,4R,5S,6S)-3,4,5-tris(benzyloxy)-2-methoxy-6-methyltetrahydro-2H-pyran (CAS 83916-89-6)
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- Propargyl-PEG7-Boc (CAS 1818294-29-9)
- 3aR,4R,5R,6aS)-Hexahydro-4-[(1E,3S)-3-hydroxy-1-octen-1-yl]-2-oxo-2H-cyclopenta[b]furan-5-yl Ester [1,1-Biphenyl]-4-carboxylic Acid (CAS 51014-26-7)
- Perfluorophenyl 4-(oxazol-5-yl)benzoate (CAS 898288-91-0)
- 3-(5-(tert-Butyl)furan-2-yl)isobenzofuran-1(3H)-one (CAS 754191-82-7)
- 5-((6-Benzyl-4-oxo-3,4,5,6,7,8-hexahydropyrido[4,3-d]pyrimidin-2-yl)amino)-2-hydroxybenzoic acid (CAS 1417636-94-2)
- 4-((4-Chlorophenyl)amino)-3-((4-chlorophenyl)sulfonyl)but-3-en-2-one (CAS 1025195-40-7)
- (E)-3-[4-(3-Fluoropropoxy)phenyl]-N-(2-thienylmethyl)-2-propenamide (CAS 477871-19-5)
- (2S)-2-((tert-butoxycarbonyl)amino)-3-(2-oxopyrrolidin-3-yl)propanoic acid (CAS 1629681-17-9)
- 1-Chloro-10-Fluorodecane (CAS 334-62-3)
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- 1-(Bromomethyl)-1-(cyclopropylmethoxy)-4-propylcyclohexane (CAS 1341386-81-9)
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