4-Bromoisophthaloyl dichloride CAS 63192-68-7
| CAS No. | 63192-68-7 |
| Molecular Formula | C8H3BrCl2O2 |
| Molecular Weight | 281.92 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
4-Bromoisophthaloyl dichloride (CAS 63192-68-7), molecular formula C8H3BrCl2O2 and molecular weight 281.92 g/mol, is a CATO reference standard with documented purity and traceability.
4-Bromoisophthaloyl dichloride (C8H3BrCl2O2) contains a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine/bromine substitution, an aromatic ring system. 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. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C8H3BrCl2O2 |
| Molecular Weight | 281.92 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1975 |
| Halogen Content | Cl/Br-containing |
Recommended Standards
- 2-Bromoterephthaloyl dichloride (CAS 13815-89-9)
- 4,5-Dibromo-2-ethylpyridazin-3(2H)-one (CAS 103977-71-5)
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- 3,5-Dibromo-6-methoxypyridin-2-amine (CAS 1261269-56-0)
- 4,4,5,5-Tetramethyl-2-(6-phenylnaphthalen-2-yl)-1,3,2-dioxaborolane (CAS 1229235-79-3)
- 1-(3-(Furan-2-yl)-1,2,4-oxadiazol-5-yl)-3-(methylsulfonyl)propan-1-amine (CAS 1468861-20-2)
- 2-(Cyclopropylmethyl)-2,8-diazaspiro[4.5]Decan-1-one hydrochloride (CAS 1385696-31-0)
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- 1-Methyl-2-nitronaphthalene (CAS 63017-87-8)
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