4,4’’-Dibromo-p-terphenyl CAS 17788-94-2
| CAS No. | 17788-94-2 |
| Molecular Formula | C18H12Br2 |
| Molecular Weight | 388.10 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
4,4’’-Dibromo-p-terphenyl (CAS 17788-94-2) is a high-purity analytical reference standard with the molecular formula C18H12Br2 and a molecular weight of 388.10 g/mol.
4,4’’-Dibromo-p-terphenyl (C18H12Br2) 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.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C18H12Br2 |
| Molecular Weight | 388.10 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| 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.) | 1962 |
| Halogen Content | Br-containing |
Related Dibromo Standards
- 2',5'-Dibromo-1,1':4',1''-terphenyl (CAS 1293386-03-4)
- 3,3''-Dibromo-1,1':2',1''-terphenyl (CAS 95918-90-4)
- 3,3''-Dibromo-1,1':3',1''-terphenyl (CAS 95962-62-2)
- 4,4''-Dibromo-1,1':2',1''-terphenyl (CAS 24253-43-8)
- 4,4''-Dibromo-1,1':3',1''-terphenyl (CAS 83909-22-2)
- 4-(6,8-Dibromo-2-methylimidazo[1,2-a]pyridin-3-yl)thiazol-2-amine (CAS 886507-34-2)
- 6,11-dibromo-1,4-diazatriphenylene (CAS 1012836-59-7)
- 5,9-Dibromo-7H-benzo[c]fluoren-7-one (CAS 1637660-36-6)
Recommended Standards
- 2,7-Bis(bromomethyl)pyrene (CAS 63996-39-4)
- 1,1,1,3,3,3-Hexafluoro-2-(3-fluoro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)propan-2-ol (CAS 2376598-54-6)
- 1-((2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-5-fluoro-6-iodopyrimidine-2,4(1H,3H)-dione (CAS 87818-06-2)
- (2Z)-3-(4-Chlorophenyl)-2-[1-methyl-5-(2,2,2-trichloroacetyl)-1H-pyrrol-2-yl]prop-2-enenitrile (CAS 246022-29-7)
- 2-(Benzo[d]thiazol-2-yl)-N-hydroxyacetimidamide (CAS 676120-26-6)
- N-Hydroxy-4-(5-methoxy-2-(trifluoromethyl)phenyl)picolinimidamide (CAS 1219454-66-6)
- 2-Methyl-1-phenyl-N-propylpropan-1-amine (CAS 93309-41-2)
- 2-Acetamido-4-(trifluoromethyl)thiazole-5-carboxylic acid (CAS 1216134-71-2)
- 2-(2-Chloroethyl)piperidine hydrochloride (CAS 60012-49-9)
- 3-Hydroxy-2,3-dimethylbutan-2-yl hydrogen (5-isopropyl-2-methylthiophen-3-yl)boronate (CAS 2223029-38-5)
- 1,1-Bis(bromomethyl)cyclopentane (CAS 68499-28-5)
- Luliconazole Impurity 16 (CAS CATO-C4X-285316)
- 2-(5-Chloro-2-methoxyphenyl)-3-methylbutan-2-ol (CAS 1342549-67-0)
- (Glu9)-Exenatide (2-39) trifluoroacetate salt (CAS 196109-34-9)
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