3-(3-Methyl-4,5-dihydro-1H-pyrazol-1-yl)benzenesulfonic acid CAS 85554-80-9
| CAS No. | 85554-80-9 |
| Molecular Formula | C10H12N2O3S |
| Molecular Weight | 240.28 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.
3-(3-Methyl-4,5-dihydro-1H-pyrazol-1-yl)benzenesulfonic acid (CAS 85554-80-9) is a high-purity analytical reference standard with the molecular formula C10H12N2O3S and a molecular weight of 240.28 g/mol.
Based on its molecular formula C10H12N2O3S, 3-(3-Methyl-4,5-dihydro-1H-pyrazol-1-yl)benzenesulfonic acid contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 240.28 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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 | C10H12N2O3S |
| Molecular Weight | 240.28 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| 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.) | 1981 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Methyl Standards
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Recommended Standards
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- 5-(1,3,4-Thiadiazol-2-yl)nicotinonitrile (CAS 1346687-62-4)
- 2-(3-Bromophenyl)-2-oxoethyl 2-(methylthio)nicotinate (CAS 481638-59-9)
- 3-{[4-(2-Methoxyethyl)phenoxy]methyl}pyrrolidinehydrochloride (CAS 1219967-80-2)
- Cesium oxalate (CAS 1068-63-9)
- 2-Bromo-N-methyl-5-(trifluoromethyl)aniline (CAS 1187395-73-8)
- 3-Oxo-4-(1,3,3-trimethylindolin-2-ylidene)butanenitrile (CAS 97214-25-0)
- Peptide Impurity 28 (CAS 1350456-64-2)
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