1,4-Dibromo-2-(chloromethyl)benzene CAS 642091-49-4
| CAS No. | 642091-49-4 |
| Molecular Formula | C7H5Br2Cl |
| Molecular Weight | 284.38 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 1,4-Dibromo-2-(chloromethyl)benzene is closely related to chlorine/bromine substitution, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies 1,4-Dibromo-2-(chloromethyl)benzene (CAS 642091-49-4), a certified reference material (molecular formula C7H5Br2Cl, MW 284.38 g/mol) for analytical method development and quality control.
Structurally, 1,4-Dibromo-2-(chloromethyl)benzene (C7H5Br2Cl) contains chlorine/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 284.38 g/mol, it falls into the medium-molecular-weight range. 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), 1,4-Dibromo-2-(chloromethyl)benzene 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 | C7H5Br2Cl |
| Molecular Weight | 284.38 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.) | 1985 |
| Halogen Content | Cl/Br-containing |
Related Dibromo Standards
- 1,4-Dibromo-2-chloro-3-methylbenzene (CAS 1000573-62-5)
- 2,5-Dibromo-1-chloro-3-methylbenzene (CAS 1000573-82-9)
- 1,2-Dibromo-4-chloro-5-methylbenzene (CAS 1160574-04-8)
- 1,3-Dibromo-4-chloro-2-methylbenzene (CAS 1263376-29-9)
- 1,2-Dibromo-3-chloro-4-methylbenzene (CAS 1881330-43-3)
- 1,3-Dibromo-2-(chloromethyl)benzene (CAS 858006-31-2)
- 1,3-Dibromo-5-(chloromethyl)benzene (CAS 74337-30-7)
- 1,4-Dibromo-2-chloro-5-methylbenzene (CAS 28667-41-6)
Recommended Standards
- 1,5-Dibromo-2-chloro-3-methylbenzene (CAS 874513-80-1)
- 1-(3-(Thiophen-2-yl)-5-(o-tolyl)-4,5-dihydro-1H-pyrazol-1-yl)ethan-1-one (CAS 710986-70-2)
- 1-Allyl-3-(4-phenoxyphenyl)thiourea (CAS 433253-68-0)
- [(4-phenyl-5-thioxo-4,5-dihydro-1,3,4-thiadiazol-2-yl)thio]acetic acid (CAS 757220-14-7)
- Stellanin (CAS 208924-36-1)
- Ethyl (R)-3-bromo-2-methylpropanoate (CAS 143645-06-1)
- Ethyl 2-(cyclopentylamino)-4-methylthiazole-5-carboxylate (CAS 735306-56-6)
- 2-{[(3,4-dichlorophenyl)methyl]sulfanyl}-5-[4-(trifluoromethyl)phenyl]-1,3,4-oxadiazole (CAS 477857-09-3)
- Febuxostat Impurity 54 (CAS 2375033-35-3)
- (1-Methyl-1H-1,2,3-triazol-5-yl)methanol (CAS 77177-12-9)
- (3,5-bis(trifluoromethyl)phenyl)(phenyl)methanone 21221-93-2 3,5-Bis(trifluoromethyl)benzophenone A4587 (CAS 21221-93-2)
- 2-Methyl-N-4,N-4-dipropyl-1,4-benzenediamine (CAS 105294-86-8)
- 2,6-Naphthalenediacetic acid (CAS 128822-58-2)
- Semaglutide Impurity 11 (CAS CATO-C4X-222611)
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