4,4''-Dibromo-1,1':2',1''-terphenyl CAS 24253-43-8
| CAS No. | 24253-43-8 |
| Molecular Formula | C18H12Br2 |
| Molecular Weight | 388.10 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4,4''-Dibromo-1,1':2',1''-terphenyl (CAS 24253-43-8), molecular formula C18H12Br2 and molecular weight 388.10 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C18H12Br2, 4,4''-Dibromo-1,1':2',1''-terphenyl contains bromine substitution, a polycyclic aromatic system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 388.10 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
CATO manufactures 4,4''-Dibromo-1,1':2',1''-terphenyl under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring 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.) | 1963 |
| Halogen Content | Br-containing |
Related Dibromo Standards
- 2',5'-Dibromo-1,1':4',1''-terphenyl (CAS 1293386-03-4)
- 4,4’’-Dibromo-p-terphenyl (CAS 17788-94-2)
- 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':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
- Bromhexine Impurity 10 (CAS 2512203-87-9)
- 2,7-Bis(bromomethyl)pyrene (CAS 63996-39-4)
- Bromhexine Impurity 11 (CAS 21237-84-3)
- Ambroxol Impurity 39 (CAS 1797894-71-3)
- 2-(1-(Tert-butoxycarbonyl)azetidin-3-yl)propanoic acid (CAS 1536183-80-8)
- (R)-Methyl 2-((2-chloro-5-nitropyrimidin-4-yl)(isopropyl)amino)butanoate (CAS 946161-16-6)
- (3-(1H-Pyrazol-4-yl)phenyl)boronic acid (CAS 1373043-38-9)
- 5-(Hydroxymethyl)thiophene-3-carbonitrile (CAS 80577-96-4)
- (2-Fluorophenyl)(3-nitrophenyl)methanone (CAS 890098-20-1)
- 2-(Trichloromethyl)pyrimidine-5-carbaldehyde (CAS 143034-45-1)
- 5-Fluoro-7H-pyrrolo[2,3-b]pyridin-4-amine (CAS 1190310-08-7)
- 6-fluoro-3-methylbenzo[d]thiazol-2(3H)-imine (CAS 79226-34-9)
- 1,3,5-Trifluoro-2,4,6-trimethylbenzene (CAS 363-64-4)
- C-Peptide（dog） (CAS 39016-05-2)
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