5-bromo-3-methylsalicylaldehyde CAS 33172-56-4
| CAS No. | 33172-56-4 |
| Molecular Formula | C8H7BrO2 |
| Molecular Weight | 215.04 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C8H7BrO2, 5-bromo-3-methylsalicylaldehyde 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 215.04 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.
5-bromo-3-methylsalicylaldehyde (CAS 33172-56-4), molecular formula C8H7BrO2 and molecular weight 215.04 g/mol, is a CATO reference standard with documented purity and traceability.
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.
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 | C8H7BrO2 |
| Molecular Weight | 215.04 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1966 |
| Halogen Content | Br-containing |
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Recommended Standards
- 5-Bromo-2-methylbenzoic Acid (CAS 79669-49-1)
- 5-Bromo-4-methylbenzo[d][1,3]dioxole (CAS 72744-51-5)
- 5-Bromo-2-methoxycyclohepta-2,4,6-trien-1-one (CAS 33816-51-2)
- 5-Chloro-1-(4-chlorophenyl)-1H-tetrazole (CAS 7025-12-9)
- (4-(Difluoromethoxy)-2,5-difluorophenyl)boronic acid (CAS 1628442-69-2)
- 2-(2-Methoxyphenyl)-2-methylcyclopropane-1-carboxylic acid (CAS 1248470-94-1)
- (2S)-2,6-Diisothiocyanato-Hexanoic Acid Ethyl Ester (CAS 92843-53-3)
- 2-Propenoic acid, 2-methyl-, polymer with butyl 2-propenoate, ethyl 2-propenoate and 2-propenoic acid (CAS 62766-55-6)
- 1-(1-Methyl-1H-pyrazol-4-yl)-4-oxo-1,4-dihydropyridazine-3-carboxylic acid (CAS 1314388-88-9)
- 2-(chloromethyl)-4,6-dimethoxypyrimidine (CAS 114108-86-0)
- 1-Benzyl-3-(2-methoxy-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)urea (CAS 2246852-97-9)
- 1-(3,5-Dimethyl-1h-pyrazol-4-yl)piperazine dihydrochloride (CAS 1858240-39-7)
- 3,4-Dichlorobenzenesulfonic Acid (CAS 939-95-7)
- [D-Ser6]-Semaglutide (CAS CATO-C4X-2226287)
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