4-(2,5-Dichlorobenzenesulfonamido)benzoic acid CAS 88522-31-0
| CAS No. | 88522-31-0 |
| Molecular Formula | C13H9Cl2NO4S |
| Molecular Weight | 346.19 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-(2,5-Dichlorobenzenesulfonamido)benzoic acid (CAS 88522-31-0), molecular formula C13H9Cl2NO4S and molecular weight 346.19 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution, 4-(2,5-Dichlorobenzenesulfonamido)benzoic acid is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 346.19 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
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 | C13H9Cl2NO4S |
| Molecular Weight | 346.19 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1982 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Dichlorobenzenesulfonamido Standards
- 2-(3,4-Dichlorobenzenesulfonamido)benzoic acid (CAS 96460-18-3)
- 3-(2,5-Dichlorobenzenesulfonamido)benzoic acid (CAS 88522-30-9)
- 3-(3,4-Dichlorobenzenesulfonamido)benzoic acid (CAS 380432-28-0)
- 4-(3,4-Dichlorobenzenesulfonamido)benzoic acid (CAS 328106-71-4)
- 2-(2,6-Dichlorobenzenesulfonamido)-4-methylpentanoic acid (CAS 1009003-67-1)
- 2-(2,6-Dichlorobenzenesulfonamido)-4-(methylsulfanyl)butanoic acid (CAS 1009262-71-8)
- 2-[4-(2,6-dichlorobenzenesulfonamido)phenyl]acetic acid (CAS 794584-42-2)
- 2-[4-(3,4-dichlorobenzenesulfonamido)phenyl]acetic acid (CAS 749896-75-1)
Recommended Standards
- 4-((2,6-Dichlorophenyl)sulfonamido)benzoic acid (CAS 613658-26-7)
- 3-(Perfluorobutyl)propanyl methacrylate (CAS 243842-15-1)
- 4-Chloro-3-[(2-chlorophenyl)sulfamoyl]benzoic acid (CAS 326023-22-7)
- 4-Chloro-3-[(4-chlorophenyl)sulfamoyl]benzoic acid (CAS 325724-62-7)
- 5-(3,5-Difluorophenyl)-1,3-oxazole-4-carboxylic acid (CAS 887267-63-2)
- 2,5-Diiodopyridin-3-ol (CAS 1142191-68-1)
- 1-Bromo-2,3,5-trichlorobenzene-d2 (CAS 1219803-86-7)
- (E)-3-(1,4-dioxaspiro[4.5]Dec-7-en-7-yl)acrylic acid (CAS 226916-19-4)
- BT-2Th12Sn (CAS 1774375-83-5)
- 2-(1,3-benzodioxol-5-yl)pyrazolo[1,5-a]pyrazin-4(5H)-one (CAS 1255777-72-0)
- 3-Amino-4-(Boc-amino)pyridine, 97% (CAS 183311-28-6)
- N,N-dimethylazepan-4-amine dihydrochloride (CAS 1242240-28-3)
- 1,3-Bis(2-nitrophenoxy)propane (CAS 14467-63-1)
- Semaglutide Impurity 191 (CAS CATO-C4X-2226191)
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