7,9-Diphenyl-8H-cyclopenta[a]acenaphthylen-8-one CAS 641-57-6
| CAS No. | 641-57-6 |
| Molecular Formula | C27H16O |
| Molecular Weight | 356.42 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
7,9-Diphenyl-8H-cyclopenta[a]acenaphthylen-8-one (CAS 641-57-6), molecular formula C27H16O and molecular weight 356.42 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 7,9-Diphenyl-8H-cyclopenta[a]acenaphthylen-8-one (C27H16O) contains a steroid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 20.0, corresponding to approximately 20 ring(s) or double-bond equivalent(s). With a molecular weight of 356.42 g/mol, it falls into the moderately-high-molecular-weight range. 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.
As a certified reference material (CRM), 7,9-Diphenyl-8H-cyclopenta[a]acenaphthylen-8-one 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 | C27H16O |
| Molecular Weight | 356.42 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 | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 20.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
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Recommended Standards
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- 7-[2-(2,6-dioxo-3-piperidyl)-1-oxo-isoindolin-5-yl]heptanal (CAS 2762039-47-2)
- (S)-1-(4-Fluorophenyl)-3-iodopropan-1-ol (CAS 926657-23-0)
- 4-(3-Fluoro-4-methylbenzoyl)-3-hydroxy-5-(4-nitrophenyl)-1-(pyridin-3-ylmethyl)-1H-pyrrol-2(5H)-one (CAS 618073-84-0)
- 3-Fluoro-2-morpholinopyridine-4-boronic acid (CAS 1256355-28-8)
- 1-(1H-Pyrrole-2-carbonyl)piperidine-3-carboxylic acid (CAS 1042602-88-9)
- Brivaracetam Impurity 204 (CAS CATO-C4X-2007204)
- Pregabalin impurity 99 (CAS 1511511-44-6)
- Calcium cyclohexylsulfamate (CAS 201280-50-4)
- 3-Bromo-2,5-dimethoxyphenol (CAS 202735-34-0)
- tert-Butyl ((1-(2-aminoacetyl)pyrrolidin-2-yl)methyl)(ethyl)carbamate (CAS 1353972-90-3)
- Semaglutide Impurity 144 (CAS 394210-59-4)
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