4',5'-Dibromofluorescein Octadecyl Ester CAS 138833-47-3
| CAS No. | 138833-47-3 |
| Molecular Formula | C38H46Br2O5 |
| Molecular Weight | 742.58 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 742.58 g/mol gives 4',5'-Dibromofluorescein Octadecyl Ester distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
4',5'-Dibromofluorescein Octadecyl Ester (CAS 138833-47-3) is a high-purity analytical reference standard with the molecular formula C38H46Br2O5 and a molecular weight of 742.58 g/mol.
Structurally, 4',5'-Dibromofluorescein Octadecyl Ester (C38H46Br2O5) contains a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, a polycyclic aromatic system. The molecule exhibits a degree of unsaturation (DBE) of 15.0, corresponding to approximately 15 ring(s) or double-bond equivalent(s). With a molecular weight of 742.58 g/mol, it falls into the 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).
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
As a certified reference material (CRM), 4',5'-Dibromofluorescein Octadecyl Ester 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 | C38H46Br2O5 |
| Molecular Weight | 742.58 g/mol |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1996 |
| Halogen Content | Br-containing |
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