4-sulfoÂbenzÂoic acid potassium salt CAS 22959-32-6
| CAS No. | 22959-32-6 |
| Molecular Formula | C7H4O5S |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-sulfoÂbenzÂoic acid potassium salt (C7H4O5SK) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. It is notably hygroscopic, 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).
4-sulfoÂbenzÂoic acid potassium salt (CAS 22959-32-6), molecular formula C7H4O5SK and molecular weight 239.26 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-sulfoÂbenzÂoic acid potassium salt 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 | C7H4O5S 2*K |
| Molecular Weight | 239.26 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1963 |
| Sulfur Atoms | 1 |
Related sulfo Standards
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- Sulfo Rhodamine Amidoethyl Mercaptan (CAS 1244034-02-3)
- trans-Sulfo-SMCC (CAS 1286837-77-1)
Recommended Standards
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- (S)-2-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-4-(2,6-difluorophenyl)butanoic acid (CAS 1260594-30-6)
- Lacidipine Impurity 11 (CAS 1174747-98-8)
- Zoledronic Acid Impurity 10 (CAS CATO-C4X-201510)
- 2-(Cyclobutylmethoxy)phenol (CAS 1485150-17-1)
- 3-(2,4-Dimethylphenyl)prop-2-en-1-ol (CAS 1359827-78-3)
- Metoclopramide impurity 56 (CAS 1242048-03-8)
- Diethyl 6-ethyl-3-iodo-6H-thieno[2,3-b]pyrrole-2,5-dicarboxylate (CAS 1956383-22-4)
- Peptide YY (3-36) (canine, mouse, porcine, rat) trifluoroacetate salt (CAS 126339-09-1)
Why CATO?
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