2’,4’-Dibromoacetophenone CAS 33243-33-3
| CAS No. | 33243-33-3 |
| Molecular Formula | C8H6Br2O |
| Molecular Weight | 277.94 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2’,4’-Dibromoacetophenone (CAS 33243-33-3), molecular formula C8H6Br2O and molecular weight 277.94 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system, 2’,4’-Dibromoacetophenone is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 277.94 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
As a certified reference material (CRM), 2’,4’-Dibromoacetophenone meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C8H6Br2O |
| Molecular Weight | 277.94 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, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1966 |
| Halogen Content | Br-containing |
Related Dibromoacetophenone Standards
Recommended Standards
- 2,6-Dibromo-4-methylbenzaldehyde (CAS 88174-23-6)
- 2-Bromo-4-(bromomethyl)benzaldehyde (CAS 345953-43-7)
- 2,5-dibromo-4-methylbenzaldehyde (CAS 706820-09-9)
- 3-(Bromomethyl)benzoyl bromide (CAS 209743-33-9)
- 2-Chloro-4-(2-fluoropyridin-3-yl)pyrimidine (CAS 954216-54-7)
- 3-(2-Chloro-6-fluorobenzyl)-4-hydroxy-1-(3-(trifluoromethyl)benzyl)pyridin-2(1H)-one (CAS 477860-63-2)
- [4-(prop-2-yn-1-yloxy)cyclohexyl]methanol (CAS 1692498-55-7)
- N-(2,3-Dimethylphenyl)-4-nitrobenzamide (CAS 35709-76-3)
- Diethyl thietane-3,3-dicarboxylate 1,1-dioxide (CAS 1823858-56-5)
- Mal-NH-PEG6-CH2CH2COOPFP ester (CAS 1599432-34-4)
- 3-(Benzyloxy)-2-(2-hydroxy-2-phenylethyl)-4H-pyran-4-one (CAS 1206102-04-6)
- Azetidin-1-yl(3-bromo-2-fluorophenyl)methanone (CAS 1026796-68-8)
- tert-Butyl 2-(3-chloropropyl)-2-cyanopyrrolidine-1-carboxylate (CAS 960294-13-7)
- D-Ala35-Tirzepatide (CAS CATO-CPTD788904)
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