3-(3-Bromo-4-hydroxy-5-methoxyphenyl)-2-oxopropanoic acid CAS 21709-84-2
| CAS No. | 21709-84-2 |
| Molecular Formula | C10H9BrO5 |
| Molecular Weight | 289.08 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
3-(3-Bromo-4-hydroxy-5-methoxyphenyl)-2-oxopropanoic acid (CAS 21709-84-2) is a high-purity analytical reference standard with the molecular formula C10H9BrO5 and a molecular weight of 289.08 g/mol.
Based on its molecular formula C10H9BrO5, 3-(3-Bromo-4-hydroxy-5-methoxyphenyl)-2-oxopropanoic acid contains a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 289.08 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 | C10H9BrO5 |
| Molecular Weight | 289.08 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| 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 |
| 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.) | 1963 |
| Halogen Content | Br-containing |
Related Bromo Standards
- 2-Bromo-N-(2-methoxy-5-nitrophenyl)acetamide (CAS 117215-85-7)
- Ethyl 2-(5-bromo-3-nitropyridin-2-yl)acetate (CAS 1211540-74-7)
- Methyl 3-bromo-4-(methylamino)-5-nitrobenzoate (CAS 1219123-06-4)
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Recommended Standards
- 2-[(5-bromo-2-nitrophenyl)(methyl)amino]acetic acid (CAS 305790-78-7)
- 3-Bromo-1,10-phenanthroline-5,6-dione (CAS 861242-82-2)
- 2-(5-Bromo-4-formyl-2-methoxyphenoxy)acetic acid (CAS 333746-44-4)
- 3-Chlorocyclopentene (CAS 96-40-2)
- 7-Bromo-1H-indazole-4-carboxylic acid (CAS 1781580-00-4)
- 5-Cyclopropoxy-N1,N1,N3-trimethylisophthalamide (CAS 1243348-08-4)
- N-Benzyl-5-(2-methyl-4-nitrophenyl)furan-2-carboxamide (CAS 337485-76-4)
- 1,4-Dimethoxy-2-(2-methylallyl)benzene (CAS 35205-21-1)
- 2-Oxopropyl 2-nitrobenzoate (CAS 54550-26-4)
- N-(6-acetylbenzo[d][1,3]dioxol-5-yl)-2-(4-benzhydrylpiperazin-1-yl)acetamide (CAS 491867-78-8)
- Cefotaxime Impurity 38 (CAS CATO-C4X-120138)
- Methyl 4-amino-6-chloropyrimidine-5-carboxylate (CAS 2091735-99-6)
- Ethyl 3-(4-Boc-1-piperazinyl)benzoate (CAS 261925-94-4)
- Immunstimulating Peptide, human (CAS 94773-24-7)
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