4'-Bromo-1,1':2',1''-terphenyl CAS 24253-40-5
| CAS No. | 24253-40-5 |
| Molecular Formula | C18H13Br |
| Molecular Weight | 309.20 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 4'-Bromo-1,1':2',1''-terphenyl 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.
4'-Bromo-1,1':2',1''-terphenyl (CAS 24253-40-5), molecular formula C18H13Br and molecular weight 309.20 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to bromine substitution, a polycyclic aromatic system, 4'-Bromo-1,1':2',1''-terphenyl is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 309.20 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
Physical & Chemical Properties
| Molecular Formula | C18H13Br |
| Molecular Weight | 309.20 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1963 |
| Halogen Content | Br-containing |
Related Bromo Standards
- 5-bromo-m-terphenyl (CAS 103068-20-8)
- 6-Bromo-N-(4-cyanobenzyl)hexanamide (CAS 1052148-20-5)
- 2-Bromo-1,1':3',1''-terphenyl (CAS 1133796-49-2)
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- 6'-Bromo-4-methoxyspiro[cyclohexane-1,2'-inden]-1'(3'H)-one (CAS 1245515-16-5)
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- 4-Bromo-p-terphenyl (CAS 1762-84-1)
- 3-Bromo-p-terphenyl (CAS 1762-87-4)
Recommended Standards
- 3-Bromo-1,1':3',1''-terphenyl (CAS 98905-03-4)
- 4-Bromo-1,1':2',1''-terphenyl (CAS 24253-37-0)
- 3-(4-Nitrophenyl)-6-(trifluoromethyl)-[1,2]oxazolo[4,5-b]pyridine (CAS 339106-18-2)
- 4'-Bromo-1,1':3',1''-terphenyl (CAS 60631-83-6)
- 5-Hydroxy-3-phenyl-2,5-dihydrofuran-2-one (CAS 66661-71-0)
- 5-(4-Chlorophenyl)-2-tosylpent-4-ynoic acid (CAS 134993-74-1)
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