7-Keto Cholesterol CAS 566-28-9
| CAS No. | 566-28-9 |
| Molecular Formula | C27H44O2 |
| Molecular Weight | 400.64 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 7-Keto Cholesterol is closely related to a steroid core, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
7-Keto Cholesterol (CAS 566-28-9) is a high-purity analytical reference standard with the molecular formula C27H44O2 and a molecular weight of 400.64 g/mol.
Owing to a steroid core, a hydroxyl group, an ether linkage, 7-Keto Cholesterol is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 400.64 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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 | C27H44O2 |
| Molecular Weight | 400.64 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| Storage | Store at room temperature, 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
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- 5-Methoxy-3-((methylsulfonyl)methyl)-1,3,4-thiadiazol-2(3H)-one (CAS 16967-89-8)
- Ethyl 3-bromo-4-ethoxybenzoate (CAS 875846-59-6)
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