9β-Pregna-4,6-diene-3,20-dione CAS 2640-38-2
| CAS No. | 2640-38-2 |
| Molecular Formula | C21H28O2 |
| Molecular Weight | 312.45 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 9β-Pregna-4,6-diene-3,20-dione.
CATO supplies 9β-Pregna-4,6-diene-3,20-dione (CAS 2640-38-2), a certified reference material (molecular formula C21H28O2, MW 312.45 g/mol) for analytical method development and quality control.
Structurally, 9β-Pregna-4,6-diene-3,20-dione (C21H28O2) contains a steroid 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 312.45 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), 9β-Pregna-4,6-diene-3,20-dione 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 | C21H28O2 |
| Molecular Weight | 312.45 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
Related Pregna Standards
Recommended Standards
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- 4,4'-(Oxybis(propane-3,1-diyl))bis(2,6-dimethylpyridine) (CAS 865074-42-6)
- Delta-5(10)-8-alfa-Levonorgestrel (CAS 5772-36-1)
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- 3-methyl-1-(piperidin-4-ylmethyl)piperidine (CAS 926254-81-1)
- 5-(methylsulfanyl)-3-phenyl-1H-1,2,4-triazole (CAS 7747-19-5)
- 9-((1R,3S)-3-((Bis(4-methoxyphenyl)(phenyl)methoxy)methyl)cyclopentyl)-9H-purin-6-amine (CAS 1071906-30-3)
- (R)-2-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-3-(5-bromo-2-fluorophenyl)propanoic acid (CAS 1997394-38-3)
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- 4-(2-Bromo-1,1-dimethyl-ethyl)-2,2-dimethyl-[1,3]dioxolane (CAS 2228141-73-7)
- 2-Isobutoxy-3-methoxybenzaldehyde (CAS 100256-90-4)
- 4-(1-Benzyl-1h-indol-3-yl)butanoic acid (CAS 270074-53-8)
- Palmitoyl Tripeptide-8 TFA salt (CAS 936544-53-5)
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