2,5-Dibromo-1,3-difluorobenzene CAS 128259-71-2
| CAS No. | 128259-71-2 |
| Molecular Formula | C6H2Br2F2 |
| Molecular Weight | 271.88 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 271.88 g/mol gives 2,5-Dibromo-1,3-difluorobenzene distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies 2,5-Dibromo-1,3-difluorobenzene (CAS 128259-71-2), a certified reference material (molecular formula C6H2Br2F2, MW 271.88 g/mol) for analytical method development and quality control.
Based on its molecular formula C6H2Br2F2, 2,5-Dibromo-1,3-difluorobenzene contains fluorine/bromine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 271.88 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.
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.
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 | C6H2Br2F2 |
| Molecular Weight | 271.88 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at room temperature, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1993 |
| Halogen Content | F/Br-containing |
Related Dibromo Standards
- 1,3-Dibromo-2,5-difluorobenzene (CAS 128259-68-7)
- 1,2-Dibromo-3,5-difluorobenzene (CAS 139215-43-3)
- 1,4-Dibromo-2,3-difluorobenzene (CAS 156682-52-9)
- 2,3-Dibromo-1,4-difluorobenzene (CAS 179737-33-8)
- 1,2-Dibromo-3,4-difluorobenzene (CAS 811713-01-6)
- 1,3-Dibromo-2,4-difluorobenzene (CAS 219926-41-7)
- 1,4-Dibromo-2,5-difluorobenzene (CAS 327-51-5)
- 1,5-Dibromo-2,3-difluorobenzene (CAS 811713-09-4)
Recommended Standards
- 2-(((Tert-butyldimethylsilyl)oxy)methyl)-6-chloroaniline (CAS 124421-14-3)
- 2,3-Dibromo-1,1,3,3-tetrafluoropropene (CAS 666-40-0)
- 4-((1-Chloropropan-2-yl)sulfonyl)-2,3-dimethylthiomorpholine (CAS 1596988-50-9)
- 4-Bromo-2,6-dichloro-3-nitropyridine (CAS 1807697-58-0)
- tert-butyl 3-(methylamino)pyrrolidine-1-carboxylate (CAS 454712-26-6)
- 2-(Thiazol-2-yl)propanoic acid (CAS 1190392-60-9)
- 1-Chloro-4,4-difluorocyclohex-1-ene (CAS 1881331-01-6)
- 2-(4-Bromophenyl)-1,1,1,3,3,3-hexafluoro-2-propanol (CAS 2402-72-4)
- 2-Hydroxy-2-(3-pyridinyl)acetic Acid (CAS 49769-60-0)
- tert-Butyl N-(1-methyl-3-oxocyclopentyl)carbamate (CAS 1638764-30-3)
- N-(azetidin-3-yl)acetamide hydrochloride (CAS 102065-92-9)
- 3-Acetyl-4-hydroxypicolinic acid (CAS 1393582-80-3)
- 2-Chloro-N-cyclopentylbenzamide (CAS 326899-54-1)
- Des-Gly34-Tirzepatide (CAS CATO-CPTD788940)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com