4-Bromo-5-chloro-2-nitrobenzaldehyde CAS 202808-23-9
| CAS No. | 202808-23-9 |
| Molecular Formula | C7H3BrClNO3 |
| Molecular Weight | 264.46 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
4-Bromo-5-chloro-2-nitrobenzaldehyde (CAS 202808-23-9) is a high-purity analytical reference standard with the molecular formula C7H3BrClNO3 and a molecular weight of 264.46 g/mol.
Structurally, 4-Bromo-5-chloro-2-nitrobenzaldehyde (C7H3BrClNO3) contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine/bromine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 264.46 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C7H3BrClNO3 |
| Molecular Weight | 264.46 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2014 |
| Halogen Content | Cl/Br-containing |
| Nitrogen Atoms | 1 |
Related Bromo Standards
- 4-Bromo-2-nitrobenzoyl chloride (CAS 112734-21-1)
- 4-Bromo-2-chloro-5-nitrobenzaldehyde (CAS 1174534-43-0)
- 2-Bromo-3-nitrobenzoyl chloride (CAS 6286-36-8)
- 2-Bromo-5-nitrobenzoyl chloride (CAS 80887-01-0)
- 3-Bromo-5-nitrobenzoyl chloride (CAS 51339-40-3)
- 4-Bromo-3-nitrobenzoyl chloride (CAS 335015-51-5)
- 5-Bromo-2-nitrobenzoyl chloride (CAS 22908-25-4)
- 5-Bromo-4-chloro-2-nitrobenzaldehyde (CAS 202808-22-8)
Recommended Standards
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- Tri-tert-butylsilane (CAS 1072-14-6)
- n-(1-(Isoquinolin-5-yl)ethyl)propan-1-amine (CAS 1310297-72-3)
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- 3-(4-Nitrophenyl)-1-phenyl-1H-pyrazole-4-carbaldehyde (CAS 21487-49-0)
- Allo-Thr5-Tirzepatide (CAS CATO-CPTD788934)
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