| CAS No. | 38557-76-5 |
| Molecular Formula | C20H20O5 |
| Molecular Weight | 340.37 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Compared with other compounds in its class, the molecular weight of 340.37 g/mol gives N-hydroxy-4-methyl-N-phenylbenzene-1-sulfonamide distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies N-hydroxy-4-methyl-N-phenylbenzene-1-sulfonamide (CAS 38557-76-5), a certified reference material (molecular formula C20H20O5, MW 340.37 g/mol) for analytical method development and quality control.
Structurally, N-hydroxy-4-methyl-N-phenylbenzene-1-sulfonamide (C20H20O5) contains a flavonoid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 11.0, corresponding to approximately 11 ring(s) or double-bond equivalent(s). With a molecular weight of 340.37 g/mol, it falls into the moderately-high-molecular-weight range. 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).
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.
| Molecular Formula | C20H20O5 |
| Molecular Weight | 340.37 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| 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 |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1968 |