4,5-Dibromo-3-chlorothiophene-2-carboxylic acid CAS 503308-99-4
| CAS No. | 503308-99-4 |
| Molecular Formula | C5HBr2ClO2S |
| Molecular Weight | 320.39 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4,5-Dibromo-3-chlorothiophene-2-carboxylic acid (CAS 503308-99-4), molecular formula C5HBr2ClO2S and molecular weight 320.39 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 4,5-Dibromo-3-chlorothiophene-2-carboxylic acid (C5HBr2ClO2S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine/bromine substitution. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 320.39 g/mol, it falls into the moderately-high-molecular-weight range. 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.
CATO manufactures 4,5-Dibromo-3-chlorothiophene-2-carboxylic acid under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C5HBr2ClO2S |
| Molecular Weight | 320.39 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature |
| 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) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1984 |
| Halogen Content | Cl/Br-containing |
| Sulfur Atoms | 1 |
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