4-(Phenylsulfonamido)benzoic acid CAS 28547-16-2
| CAS No. | 28547-16-2 |
| Molecular Formula | C13H11NO4S |
| Molecular Weight | 277.30 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 277.30 g/mol gives 4-(Phenylsulfonamido)benzoic acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
4-(Phenylsulfonamido)benzoic acid (CAS 28547-16-2), molecular formula C13H11NO4S and molecular weight 277.30 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 4-(Phenylsulfonamido)benzoic acid (C13H11NO4S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 9.0, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 277.30 g/mol, it falls into the medium-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C13H11NO4S |
| Molecular Weight | 277.30 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 |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1965 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Phenylsulfonamido Standards
- 2-(Phenylsulfonamido)benzoic acid (CAS 34837-67-7)
- Methyl 5-(phenylsulfonamido)pentanoate (CAS 1330753-91-7)
- 6-(Phenylsulfonamido)hexanoic acid (CAS 61714-42-9)
- 3-(Phenylsulfonamido)thiophene-2-carboxylic acid (CAS 409364-78-9)
- n-(2-(Phenylsulfonamido)ethyl)isobutyramide (CAS 1030770-38-7)
- 3-(Phenylsulfonamido)-N-propylpropanamide (CAS 945367-03-3)
- 7-(Phenylsulfonamido)heptanoic acid (CAS 123469-53-4)
- (S)-2-(Phenylsulfonamido)pentanedioic acid (CAS 20531-36-6)
Recommended Standards
- 4-(Phenylsulfamoyl)benzoic acid (CAS 6314-72-3)
- 4,5-Dimethoxy-2-(5-oxo-2-thioxoimidazolidin-1-yl)benzonitrile (CAS 478039-80-4)
- 4-(2-Formylphenoxy)benzenesulfonamide (CAS 902837-00-7)
- 4-Oxo-4-((5-phenyl-1,3,4-thiadiazol-2-yl)amino)butanoic acid (CAS 339240-01-6)
- 2-(Difluoromethyl)-5-iodo-3-(trifluoromethyl)pyridine-6-carboxaldehyde (CAS 1806951-99-4)
- N,N-dimethyl-4-(methylamino)pyridine-3-sulfonamide (CAS 1341665-63-1)
- (2Z)-2-[(1E)-(Methoxyimino)methyl]-3-(1H-pyrrol-2-yl)prop-2-enenitrile (CAS 339278-29-4)
- 5-Fluoro-2-methyl-4-(trifluoromethoxy)aniline (CAS 1706430-25-2)
- 2-Cyanotetrahydrofuran-2-carboxylic acid (CAS 2302599-83-1)
- Cidofovir Impurity 1 (CAS 133868-60-7)
- Dimethyl tridecanedioate (CAS 1472-87-3)
- 5-Bromo-4-methyl-1-(2-methylpropoxy)pyridine (CAS 1289131-61-8)
- NVS-PAK1-1 (CAS 1783816-74-9)
- Insulin Degludec Impurity 27 (CAS CATO-C4X-215727)
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