1-(Bromomethyl)-2,4-dichlorobenzene CAS 20443-99-6
| CAS No. | 20443-99-6 |
| Molecular Formula | C7H5BrCl2 |
| Molecular Weight | 239.92 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 1-(Bromomethyl)-2,4-dichlorobenzene 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.
1-(Bromomethyl)-2,4-dichlorobenzene (CAS 20443-99-6), molecular formula C7H5BrCl2 and molecular weight 239.92 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 1-(Bromomethyl)-2,4-dichlorobenzene (C7H5BrCl2) is characterized by chlorine/bromine substitution, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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.
Physical & Chemical Properties
| Molecular Formula | C7H5BrCl2 |
| Molecular Weight | 239.92 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.) | 1962 |
| Halogen Content | Cl/Br-containing |
Related Bromomethyl Standards
- 1-(Bromomethyl)-3,5-dichlorobenzene (CAS 7778-01-0)
- 2-(Bromomethyl)-1,4-dichlorobenzene (CAS 85482-13-9)
- 2-(Bromomethyl)-5-(trifluoromethyl)pyridine (CAS 1000773-62-5)
- 3-(Bromomethyl)-5-(trifluoromethyl)pyridine (CAS 1227574-31-3)
- 4-(bromomethyl)-2-(trifluoromethyl)pyridine (CAS 1227585-56-9)
- 3-(Bromomethyl)-2-(trifluoromethyl)pyridine (CAS 1227602-81-4)
- 4-Bromomethyl-3-(trifluoromethyl)pyridine (CAS 1227606-67-8)
- 2-(Bromomethyl)-4-(trifluoromethyl)pyridine (CAS 1227606-71-4)
Recommended Standards
- 2-Bromo-1,3-dichloro-5-methylbenzene (CAS 19393-93-2)
- 3,4-Dichlorobenzyl Bromide (CAS 18880-04-1)
- 1-bromo-2-chloro-4-(chloromethyl)benzene (CAS 95349-72-7)
- 4-bromo-2-chloro-1-(chloromethyl)benzene (CAS 185315-49-5)
- 4-Ethoxy-2-(ethylthio)pyrimidine (CAS 84289-47-4)
- 2,4,6-Triisobutyl-1,3,5-trioxane (CAS 68165-40-2)
- 4-Isobutyl-5-(1,3,6-trimethyl-1h-pyrazolo[3,4-b]pyridin-4-yl)-4h-1,2,4-triazole-3-thiol (CAS 937598-10-2)
- 1-(3-Bromo-2-fluorophenyl)cyclopentane-1-carbonitrile (CAS 1881330-55-7)
- Ethyl 2-((6-(4-bromophenyl)-3-cyano-4-phenylpyridin-2-yl)thio)acetate (CAS 332101-51-6)
- 1-(2-Cyclopropyl-6-ethylpyrimidin-4-yl)piperidine-4-carboxylic acid (CAS 1713639-63-4)
- 3,4-Dimethyl-1-(pyridin-2-yl)pyrano[2,3-c]pyrazol-6(1H)-one (CAS 74169-58-7)
- 3-(2-BRomophenoxy)piperidine (CAS 954223-02-0)
- 4-(5-(Pyrrolidin-1-ylmethyl)-1,2,4-oxadiazol-3-yl)benzaldehyde (CAS 1119452-06-0)
- Semaglutide impurity 95 (CAS CATO-C4X-222695)
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