2-(5-Methyl-3-oxo-2,3-dihydro-1H-pyrazol-1-yl)benzenesulfonic acid CAS 61572-62-1
| CAS No. | 61572-62-1 |
| Molecular Formula | C10H10N2O4S |
| Molecular Weight | 254.26 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
2-(5-Methyl-3-oxo-2,3-dihydro-1H-pyrazol-1-yl)benzenesulfonic acid (CAS 61572-62-1), molecular formula C10H10N2O4S and molecular weight 254.26 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 2-(5-Methyl-3-oxo-2,3-dihydro-1H-pyrazol-1-yl)benzenesulfonic acid (C10H10N2O4S) 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 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 254.26 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C10H10N2O4S |
| Molecular Weight | 254.26 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1974 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Recommended Standards
- 2-(4-Nitrophenyl)-1,3-thiazolidine-4-carboxylic acid (CAS 72678-85-4)
- 2-{2-[(difluoromethyl)sulfanyl]pyrimidin-4-yl}phenol (CAS 477859-75-9)
- 2-(4-Fluorophenyl)-8-methylimidazo[1,2-a]pyridine-3-carbaldehyde (CAS 727652-03-1)
- 2-amino-4-(3,4-difluorophenyl)thiophene-3-carboxamide (CAS 953890-64-7)
- Methyl 6-(((benzyloxy)carbonyl)amino)hexanoate (CAS 25580-87-4)
- 8-((1R,2R,3S,5R)-2-(2-Carboxyethyl)-3,5-dihydroxycyclopentyl)-6-oxooctanoic acid (CAS 23109-94-6)
- 3-((Trifluoromethyl)thio)pyrrolidine hydrochloride (CAS 2493237-03-7)
- (2E)-3-[3-Chloro-2-sulfanylidene-5-(trifluoromethyl)-1,2-dihydropyridin-1-yl]-1-(4-chlorophenyl)prop-2-en-1-one (CAS 338953-40-5)
- 1-[(3-Chlorophenyl)methyl]-3-(2-phenoxyethyl)imidazolidine-2,4,5-trione (CAS 303986-25-6)
- 1019529-87-3 (4-Isopropylphenyl)propylamine MFCD09753305 (CAS 1019529-87-3)
- Sulfoxaflor-D3-13C2-15N2 (CAS CATO-CCPD102490)
- 4-Methyl-6-(piperazin-1-yl)pyrimidine dihydrochloride (CAS 1365988-09-5)
- 1-(sec-Butyl)-N-((1-ethyl-1H-pyrazol-5-yl)methyl)-1H-pyrazol-3-amine hydrochloride (CAS 1855946-61-0)
- Tirzepatide Impurity 43 (CAS CATO-C4X-324043)
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