4'-(Chlorosulfonyl)-[1,1'-biphenyl]-4-carboxylic acid CAS 340759-68-4
| CAS No. | 340759-68-4 |
| Molecular Formula | C13H9ClO4S |
| Molecular Weight | 296.73 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 4'-(Chlorosulfonyl)-[1,1'-biphenyl]-4-carboxylic acid.
4'-(Chlorosulfonyl)-[1,1'-biphenyl]-4-carboxylic acid (CAS 340759-68-4) is a high-purity analytical reference standard with the molecular formula C13H9ClO4S and a molecular weight of 296.73 g/mol.
Based on its molecular formula C13H9ClO4S, 4'-(Chlorosulfonyl)-[1,1'-biphenyl]-4-carboxylic acid contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 296.73 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
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 | C13H9ClO4S |
| Molecular Weight | 296.73 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| 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 |
| Sulfur Atoms | 1 |
Related Chlorosulfonyl Standards
- 4'-(Chlorosulfonyl)-[1,1'-biphenyl]-3-carboxylic acid (CAS 1417793-58-8)
- 2-(2-(Chlorosulfonyl)-6,7-dihydro-4h-thieno[3,2-c]pyran-4-yl)acetic acid (CAS 1258640-16-2)
- 4-[4-(chlorosulfonyl)-2-fluorophenoxy]butanoic acid (CAS 1016838-81-5)
- Ethyl 3-(chlorosulfonyl)-5-fluoro-4-methoxybenzoate (CAS 1154199-03-7)
- ethyl 2-(chlorosulfonyl)-4-fluoro-5-methoxybenzoate (CAS 1513252-14-6)
- Methyl 5-(chlorosulfonyl)thieno[2,3-b]thiophene-2-carboxylate (CAS 129949-97-9)
- benzyl 3-(chlorosulfonyl)azetidine-1-carboxylate (CAS 1311315-85-1)
- 5-(chlorosulfonyl)-2-(2-methoxyethoxy)benzoic acid (CAS 1152569-75-9)
Recommended Standards
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