2-Bromo-7-chlorospiro[fluorene-9,9'-xanthene] CAS 2259716-83-9
| CAS No. | 2259716-83-9 |
| Molecular Formula | C25H14BrClO |
| Molecular Weight | 445.74 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
2-Bromo-7-chlorospiro[fluorene-9,9'-xanthene] (CAS 2259716-83-9), molecular formula C25H14BrClO and molecular weight 445.74 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 2-Bromo-7-chlorospiro[fluorene-9,9'-xanthene] (C25H14BrClO) contains a steroid core, a hydroxyl group, an ether linkage, chlorine/bromine substitution. The molecule exhibits a degree of unsaturation (DBE) of 18.0, corresponding to approximately 18 ring(s) or double-bond equivalent(s). With a molecular weight of 445.74 g/mol, it falls into the moderately-high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
As a certified reference material (CRM), 2-Bromo-7-chlorospiro[fluorene-9,9'-xanthene] 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 | C25H14BrClO |
| Molecular Weight | 445.74 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| 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) | 18.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1998 |
| Halogen Content | Cl/Br-containing |
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