2,3-Dichloro-5-(chlorosulfonyl)benzoic acid CAS 53552-95-7
| CAS No. | 53552-95-7 |
| Molecular Formula | C7H3Cl3O4S |
| Molecular Weight | 289.52 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 289.52 g/mol gives 2,3-Dichloro-5-(chlorosulfonyl)benzoic acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
2,3-Dichloro-5-(chlorosulfonyl)benzoic acid (CAS 53552-95-7) is a high-purity analytical reference standard with the molecular formula C7H3Cl3O4S and a molecular weight of 289.52 g/mol.
2,3-Dichloro-5-(chlorosulfonyl)benzoic acid (C7H3Cl3O4S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. It is notably hygroscopic, 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.
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 | C7H3Cl3O4S |
| Molecular Weight | 289.52 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening; 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.) | 1972 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
Related Dichloro Standards
- 2,6-Dichloro-3-(chlorosulfonyl)benzoic acid (CAS 53553-05-2)
- 3,4-Dichloro-5-(chlorosulfonyl)benzoic acid (CAS 151104-67-5)
- 2,4-Dichloro-6-(difluoromethoxy)phenacyl chloride (CAS 1803717-67-0)
- 2,6-Dichloro-4-(difluoromethoxy)phenacyl chloride (CAS 1803717-69-2)
- 2,3-Dichloro-4-(difluoromethoxy)phenacyl chloride (CAS 1803791-03-8)
- 3,5-Dichloro-2-(difluoromethoxy)phenacyl chloride (CAS 1803791-13-0)
- 3,4-Dichloro-5-(difluoromethoxy)phenacyl chloride (CAS 1803818-55-4)
- 2,4-Dichloro-5-(difluoromethoxy)phenacyl chloride (CAS 1804516-92-4)
Recommended Standards
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- (1H-Imidazol-4-yl)(pyridin-3-yl)methanol (CAS 304457-84-9)
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- 2,3-Diethyl-6-(4-methylpiperazin-1-yl)quinoxaline (CAS 691873-14-0)
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- Peptide WE-14 (CAS 115136-18-0)
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