3-Bromo-4,5-difluorotoluene CAS 1143502-74-2
| CAS No. | 1143502-74-2 |
| Molecular Formula | C7H5BrF2 |
| Molecular Weight | 207.02 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.
3-Bromo-4,5-difluorotoluene (CAS 1143502-74-2) is a high-purity analytical reference standard with the molecular formula C7H5BrF2 and a molecular weight of 207.02 g/mol.
Structurally, 3-Bromo-4,5-difluorotoluene (C7H5BrF2) contains fluorine/bromine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 207.02 g/mol, it falls into the medium-molecular-weight range. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 | C7H5BrF2 |
| Molecular Weight | 207.02 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.) | 1989 |
| Halogen Content | F/Br-containing |
Related Bromo Standards
- 5-Bromo-1,2-difluoro-3-methylbenzene (CAS 1143502-75-3)
- 2-Bromo-3,6-difluorotoluene (CAS 1208074-75-2)
- 1-Bromo-2,5-difluoro-3-methylbenzene (CAS 1416354-32-9)
- 5-Bromo-2,4-difluorotoluene (CAS 159277-47-1)
- 1-Bromo-3-fluoro-5-(fluoromethyl)benzene (CAS 1715032-20-4)
- 1-Bromo-3-fluoro-2-(fluoromethyl)benzene (CAS 1782526-83-3)
- 2-Bromo-1-fluoro-4-(fluoromethyl)benzene (CAS 1783551-07-4)
- 1-Bromo-3,5-difluoro-2-methylbenzene (CAS 1783551-12-1)
Recommended Standards
- 3,6-Dichloro-2-Hydroxy Benzoic Acid (CAS 3401-80-7)
- Dicloran (CAS 99-30-9)
- Aminopyralid (CAS 150114-71-9)
- 2,4-Dichloropyrimidine-5-carbohydrazide (CAS 1379317-74-4)
- 1-((3-Acetoxy-4-methyl-2-oxo-2H-chromen-7-yl)amino)-2,5-dioxopyrrolidine-3-sulfonic acid (CAS 152305-86-7)
- Tin selenide (CAS 1315-06-6)
- (3S,4S,5S,6R)-2-(Hydroxymethyl)-6-(1H-indol-1-yl)-tetrahydro-2H-pyran-3,4,5-triol (CAS 5059-37-0)
- p-Orcacetophenone (CAS 1634-34-0)
- 3-(2-Methoxyphenyl)-1H-pyrazole (CAS 59843-63-9)
- 2-(4-Chloro-2-methylphenoxy)-2,2-difluoro-N-(4-fluorophenyl)acetamide (CAS 339011-04-0)
- Cefuroxime Impurity 26 (CAS 37051-07-3)
- Brinzolamide Impurity 13 (CAS 138890-50-3)
- 1,1,1,2,2,3,3,4,4-Nonafluoro-4-methoxybutane compound with 2-(difluoro(methoxy)methyl)-1,1,1,2,3,3,3-heptafluoropropane (1:1) (CAS 219484-64-7)
- Semaglutide Impurity 6 (CAS 62-57-7)
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