2-Bromo-4,4'-di-tert-Butyl-1,1'-biphenyl CAS 70728-89-1
| CAS No. | 70728-89-1 |
| Molecular Formula | C20H25Br |
| Molecular Weight | 345.32 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 2-Bromo-4,4'-di-tert-Butyl-1,1'-biphenyl (CAS 70728-89-1), a certified reference material (molecular formula C20H25Br, MW 345.32 g/mol) for analytical method development and quality control.
2-Bromo-4,4'-di-tert-Butyl-1,1'-biphenyl (C20H25Br) contains bromine substitution, a polycyclic aromatic system. Halogen substitution raises its density and boiling point, its high carbon-to-hydrogen ratio confers good lipid solubility; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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), 2-Bromo-4,4'-di-tert-Butyl-1,1'-biphenyl 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 | C20H25Br |
| Molecular Weight | 345.32 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1977 |
| Halogen Content | Br-containing |
Related Bromo Standards
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Recommended Standards
- 2-(Naphthalen-1-yloxy)-N-(3-(trifluoromethyl)phenyl)acetamide (CAS 333341-71-2)
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- 3-Fluoro-5-(isopentyloxy)benzaldehyde (CAS 1443336-49-9)
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- 4-Benzyloxy-2-(trifluoromethoxy)benzaldehyde (CAS 1809158-19-7)
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Why CATO?
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