4-sulfamoylbenzoic acid CAS 138-41-0
| CAS No. | 138-41-0 |
| Molecular Formula | C7H7NO4S |
| Molecular Weight | 201.20 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies 4-sulfamoylbenzoic acid (CAS 138-41-0), a certified reference material (molecular formula C7H7NO4S, MW 201.20 g/mol) for analytical method development and quality control.
The molecular framework of 4-sulfamoylbenzoic acid (C7H7NO4S) is characterized by an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C7H7NO4S |
| Molecular Weight | 201.20 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related sulfamoylbenzoic Standards
- 3-Sulfamoylbenzoic Acid (CAS 636-76-0)
- 2-Sulfamoylbenzoic acid (CAS 632-24-6)
- 3-Methyl-5-sulfamoylbenzoic acid (CAS 1016703-57-3)
- 2-Methyl-3-sulfamoylbenzoic acid (CAS 1342428-00-5)
- 5-Methyl-2-sulfamoylbenzoic acid (CAS 1384725-79-4)
- 2-Methyl-4-sulfamoylbenzoic acid (CAS 860752-46-1)
- 3-Methyl-4-sulfamoylbenzoic acid (CAS 866997-46-8)
- 4-Methyl-3-sulfamoylbenzoic acid (CAS 20532-05-2)
Recommended Standards
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- Ethyl 2-(2-fluoro-3-methylpyridin-4-yl)acetate (CAS 1393555-41-3)
- C-Peptide 1 (rat) (CAS 41475-27-8)
Why CATO?
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