2,2’-Dibromo-9,9’-spirobifluorene CAS 67665-47-8
| CAS No. | 67665-47-8 |
| Molecular Formula | C25H14Br2 |
| Molecular Weight | 474.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 2,2’-Dibromo-9,9’-spirobifluorene 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.
2,2’-Dibromo-9,9’-spirobifluorene (CAS 67665-47-8) is a high-purity analytical reference standard with the molecular formula C25H14Br2 and a molecular weight of 474.19 g/mol.
Structurally, 2,2’-Dibromo-9,9’-spirobifluorene (C25H14Br2) contains bromine substitution, a polycyclic aromatic system. 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 474.19 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).
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.
Physical & Chemical Properties
| Molecular Formula | C25H14Br2 |
| Molecular Weight | 474.19 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 |
| 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.) | 1976 |
| Halogen Content | Br-containing |
Related Dibromo Standards
- 3,6-Dibromo-9,9'-spirobi[fluorene] (CAS 1373114-50-1)
- 2,7-Dibromo-9,9’-spirobifluorene (CAS 171408-84-7)
- Ethyl 6,6-dibromo-2-(2-chloroacetamido)-7-oxo-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylate (CAS 113432-89-6)
- 4,7-Dibromo-2-dodecylisoindoline-1,3-dione (CAS 1159905-88-0)
- 6,8-Dibromo-3-(4-bromobenzyl)quinazolin-4(3H)-one (CAS 302913-27-5)
- Ethyl 2,3-dibromo-3-(4-chloro-2-fluoro-5-(2-(methylamino)-2-oxoethoxy)phenyl)propanoate (CAS 2151826-94-5)
- 4',5'-Dibromo-[1,1':2',1''-terphenyl]-4,4''-dicarboxylicacid (CAS 1670924-30-7)
- 4,4"-Dibromo-2,2',2",5,5',5"-hexamethyl-1,1':4',1"-terphenyl (CAS 1382735-12-7)
Recommended Standards
- P7C3, 98% (CAS 301353-96-8)
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- N'-{6-iodoimidazo[1,2-a]pyridine-2-carbonyl}-4-(trifluoromethyl)benzohydrazide (CAS 860787-45-7)
- Ambroxol Impurity 13 (CAS 305867-38-3)
- 4-(3-Piperidinyl)morpholine dihydrochloride (CAS 1124199-56-9)
- Methyl (2E)-3-[(4-ethylphenyl)amino]-2-(2-fluorobenzenesulfonyl)prop-2-enoate (CAS 1327171-77-6)
- 4-Methoxy-N-(1-methoxypropan-2-yl)-4-methylpentan-2-amine (CAS 1038312-86-5)
- 2-Fluoro-4-(2-hydroxy-ethoxy)-benzonitrile (CAS 1448674-05-2)
- 7-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-indazol-3-amine (CAS 1626335-94-1)
- N-((RS)-2-Hydroxy-2-phenyl-ethyl)-Val-Leu-anilide (CAS 282732-35-8)
- (3,5-Dibromo-2-hydroxyphenyl)(1-phenyl-1H-pyrazol-4-yl)methanone (CAS 68287-77-4)
- N-Benzyl-1h-benzo[d][1,2,3]triazole-1-carbothioamide (CAS 690634-11-8)
- 1-(2-Bromoethyl)-3-ethoxybenzene (CAS 1342391-53-0)
- Tau Peptide (277-291) trifluoroacetate salt (CAS 330456-40-1)
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