3-Bromo-4-chlorobenzoyl chloride CAS 21900-34-5
| CAS No. | 21900-34-5 |
| Molecular Formula | C7H3BrCl2O |
| Molecular Weight | 253.91 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures 3-Bromo-4-chlorobenzoyl chloride under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
3-Bromo-4-chlorobenzoyl chloride (CAS 21900-34-5) is a high-purity analytical reference standard with the molecular formula C7H3BrCl2O and a molecular weight of 253.91 g/mol.
Based on its molecular formula C7H3BrCl2O, 3-Bromo-4-chlorobenzoyl chloride contains a hydroxyl group, an ether linkage, chlorine/bromine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 253.91 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.
Physical & Chemical Properties
| Molecular Formula | C7H3BrCl2O |
| Molecular Weight | 253.91 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.) | 1963 |
| Halogen Content | Cl/Br-containing |
Related Bromo Standards
- 2-Bromo-3,6-dichlorobenzaldehyde (CAS 1114809-26-5)
- 4-Bromo-2,6-dichlorobenzaldehyde (CAS 111829-72-2)
- 2-Bromo-3-chlorobenzoyl chloride (CAS 116529-64-7)
- 2-Bromo-6-chlorobenzoyl chloride (CAS 116529-65-8)
- 2-Bromo-4-chlorobenzoyl chloride (CAS 116779-74-9)
- 4-Bromo-3,5-dichlorobenzaldehyde (CAS 120077-80-7)
- 5-Bromo-2,3-dichlorobenzaldehyde (CAS 1229246-37-0)
- 3-Bromo-2,6-dichlorobenzaldehyde (CAS 1254701-24-0)
Recommended Standards
- 3-Bromo-2-chlorobenzoyl chloride (CAS 21900-59-4)
- 3-Bromo-5-chlorobenzoyl chloride, 98% (CAS 21900-27-6)
- 2-Bromo-5-Chlorobenzoyl chloride (CAS 42860-16-2)
- 4-Bromo-2-chlorobenzoyl chloride (CAS 21900-55-0)
- 2-((4-(4-Bromophenyl)-5-(pyridin-3-yl)-4H-1,2,4-triazol-3-yl)thio)-N-(3-fluoro-4-methylphenyl)acetamide (CAS 477332-84-6)
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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