4-Bromo-7-methylisatin CAS 874375-17-4
| CAS No. | 874375-17-4 |
| Molecular Formula | C9H6BrNO2 |
| Molecular Weight | 240.05 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-Bromo-7-methylisatin (CAS 874375-17-4), molecular formula C9H6BrNO2 and molecular weight 240.05 g/mol, is a CATO reference standard with documented purity and traceability.
4-Bromo-7-methylisatin (C9H6BrNO2) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, bromine substitution. Halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C9H6BrNO2 |
| Molecular Weight | 240.05 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 1 |
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- 1,2-Di(thiophen-2-yl)ethene (CAS 15332-30-6)
- 2-Methyl-2H-[1,2,3]triazolo[4,5-d]pyrimidine (CAS 16208-56-3)
- 1,4-Diphenyl-1H-1,2,3-triazole (CAS 13148-78-2)
- Ethyl 3-(2-hydrazino-2-oxoethoxy)pyrido[1,2-a]indole-10-carboxylate (CAS 339020-44-9)
- Tirzepatide Impurity 57 (CAS CATO-C4X-324057)
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