4-Bromo-3,5-dimethyl-1,1'-biphenyl CAS 756873-19-5
| CAS No. | 756873-19-5 |
| Molecular Formula | C14H13Br |
| Molecular Weight | 261.16 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.
4-Bromo-3,5-dimethyl-1,1'-biphenyl (CAS 756873-19-5), molecular formula C14H13Br and molecular weight 261.16 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C14H13Br, 4-Bromo-3,5-dimethyl-1,1'-biphenyl contains bromine substitution, a polycyclic aromatic system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 261.16 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C14H13Br |
| Molecular Weight | 261.16 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| 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.) | 1986 |
| Halogen Content | Br-containing |
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Recommended Standards
- 4-Bromo-2,6-dimethylbiphenyl (CAS 958650-71-0)
- 5-(bromomethyl)bicyclo[3.3.1]nonane-1-carboxylic acid (CAS 256954-28-6)
- 4'-Bromo-2,5-dimethyl-1,1'-biphenyl (CAS 89346-51-0)
- 5-bromo-[1,2,4]triazolo[4,3-a][1,8]naphthyridine (CAS 2306274-88-2)
- 2-Bromo-5-chloro-3-fluoropyridine (CAS 514797-97-8)
- Methyl 3-bromo-4-[(chlorosulfonyl)methyl]benzoate (CAS 1061617-77-3)
- 2-Amino-5-(cyanomethyl)-3-(difluoromethyl)isonicotinonitrile (CAS 1805108-89-7)
- 2-Methylpropane (CAS 75-28-5)
- Amorolfine EP Impurity H HCl (CAS CATO-C4X-15429)
- 1,4-Dichlorophthalazine-6-carbonyl chloride (CAS 2380-50-9)
- Benzyl (4-(2-hydroxyethyl)phenyl)carbamate (CAS 214980-03-7)
- Pyridoxal-5-Phosphate ·x hydrate (CAS 853645-22-4)
- Methyl 5-bromo-4-cyclopropylthiophene-2-carboxylate (CAS 2514953-04-7)
- Semaglutide impurity 83 (CAS CATO-C4X-222683)
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