4-Methyl-3-nitrobenzenesulfonic acid CAS 97-06-3
| CAS No. | 97-06-3 |
| Molecular Formula | C7H7NO5S |
| Molecular Weight | 217.20 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.
4-Methyl-3-nitrobenzenesulfonic acid (CAS 97-06-3), molecular formula C7H7NO5S and molecular weight 217.20 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, 4-Methyl-3-nitrobenzenesulfonic acid is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 217.20 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
Physical & Chemical Properties
| Molecular Formula | C7H7NO5S |
| Molecular Weight | 217.20 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 Methyl Standards
- 2-Methyl-4-nitrobenzenesulfonic acid (CAS 7434-70-0)
- 4-Methyl-2-nitrobenzenesulfonic acid (CAS 65542-35-0)
- 4-Nitrobenzenesulfonic Acid (CAS 138-42-1)
- 3-Nitrobenzenesulfonic acid (CAS 98-47-5)
- 2-Nitrobenzenesulfonic Acid Hydrate (CAS 80-82-0)
- 3-Nitrobenzenesulfonic acid hydrate (CAS 79326-96-8)
- 2-Nitrobenzenesulfonic Acid Hydrate (CAS CATO-CCHM704091)
Recommended Standards
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- 4-Hydroxy-2-sulfamoylbenzoic acid (CAS 43059-27-4)
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- 7-Bromo-2-(3-fluorophenyl)-[1,2,4]triazolo[1,5-a]pyridine (CAS 1380331-92-9)
- Almokalant Impurity 1 (CAS 123955-09-9)
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