2,5-Dichlorobenzoic Acid CAS 50-79-3
| CAS No. | 50-79-3 |
| Molecular Formula | C7H4Cl2O2 |
| Molecular Weight | 191.01 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2,5-Dichlorobenzoic Acid (C7H4Cl2O2) contains a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine 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. 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).
2,5-Dichlorobenzoic Acid (CAS 50-79-3), molecular formula C7H4Cl2O2 and molecular weight 191.01 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.
CATO manufactures 2,5-Dichlorobenzoic 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 | C7H4Cl2O2 |
| Molecular Weight | 191.01 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | >95% |
| Storage | Store at 2-8°C, 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.) | 1957 |
| Halogen Content | Cl-containing |
Related Dichlorobenzoic Standards
- 2,6-Dichlorobenzoic Acid (CAS 50-30-6)
- 3,4-Dichlorobenzoic Acid (CAS 51-44-5)
- 3,5-Dichlorobenzoic Acid (CAS 51-36-5)
- 2,3-Dichlorobenzoic Acid- (CAS 1184971-82-1)
- 2,3-Dichlorobenzoic-d3 Acid (CAS 1126107-18-3)
- 3,5-Dichlorobenzoic-d3 Acid (CAS 1219803-99-2)
- 2,6-Dichlorobenzoic-d3 Acid (CAS 1219805-50-1)
- 2,4-Dichlorobenzoic acid-d3 (CAS 1398065-99-0)
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Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
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