4-(3,4-Dichlorobenzenesulfonamido)benzoic acid CAS 328106-71-4
| CAS No. | 328106-71-4 |
| Molecular Formula | C13H9Cl2NO4S |
| Molecular Weight | 346.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution, 4-(3,4-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 aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
4-(3,4-Dichlorobenzenesulfonamido)benzoic acid (CAS 328106-71-4), molecular formula C13H9Cl2NO4S and molecular weight 346.19 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 4-(3,4-Dichlorobenzenesulfonamido)benzoic 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 | 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.) | 2025 |
| 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-(2,5-Dichlorobenzenesulfonamido)benzoic acid (CAS 88522-31-0)
- 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-Chloro-3-[(2-chlorophenyl)sulfamoyl]benzoic acid (CAS 326023-22-7)
- 4-((2,6-Dichlorophenyl)sulfonamido)benzoic acid (CAS 613658-26-7)
- 4-Chloro-3-[(4-chlorophenyl)sulfamoyl]benzoic acid (CAS 325724-62-7)
- 3-(Perfluorobutyl)propanyl methacrylate (CAS 243842-15-1)
- (1,5-Cyclooctadiene)tris(trimethylphosphine)iridium(1+) chloride (CAS 118494-48-7)
- 3-Chloro-5-propoxypyridazine (CAS 1346698-30-3)
- 5-{3,7-dioxabicyclo[4.1.0]heptan-6-yl}-1-methyl-1H-pyrazole (CAS 2044773-09-1)
- N'-((1H-Pyrrol-2-yl)methylene)butyrohydrazide (CAS 113905-24-1)
- 2-Chloro-N-cyclopentylacetamide (CAS 125674-23-9)
- 1-(1,5-Dimethyl-1H-pyrrol-2-yl)ethanone (CAS 35250-69-2)
- 5-(Bromomethyl)-2-chloro-3-methylpyridine (CAS 1003859-10-6)
- (R)-4-(4-Bromophenyl)pyrrolidin-2-one (CAS 1353143-39-1)
- ((2R,3S,4S,5R)-3,4-Dihydroxytetrahydrofuran-2,5-diyl)bis(methylene) bis(dihydrogen phosphate) (CAS 671-08-9)
- Tirzepatide Impurity 46 (CAS CATO-C4X-324046)
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