5-amino-1-(4-methylbenzenesulfonyl)-2,3-dihydro-1H-pyrazol-3-one CAS 240117-38-8
| CAS No. | 240117-38-8 |
| Molecular Formula | C10H11N3O3S |
| Molecular Weight | 253.28 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 5-amino-1-(4-methylbenzenesulfonyl)-2,3-dihydro-1H-pyrazol-3-one.
CATO supplies 5-amino-1-(4-methylbenzenesulfonyl)-2,3-dihydro-1H-pyrazol-3-one (CAS 240117-38-8), a certified reference material (molecular formula C10H11N3O3S, MW 253.28 g/mol) for analytical method development and quality control.
5-amino-1-(4-methylbenzenesulfonyl)-2,3-dihydro-1H-pyrazol-3-one (C10H11N3O3S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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.
Physical & Chemical Properties
| Molecular Formula | C10H11N3O3S |
| Molecular Weight | 253.28 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related amino Standards
- Methyl 4-amino-2-((furan-2-ylmethyl)amino)thiazole-5-carboxylate (CAS 1193388-37-2)
- Ethyl 2-amino-4-(1-methyl-1H-1,2,4-triazol-5-yl)thiazole-5-carboxylate (CAS 1229426-21-4)
- 4-Amino-N-(4-methylisoxazol-3-yl)benzenesulfonamide (CAS 1829-84-1)
- 2-(6-Amino-9H-purin-8-ylsulfanyl)-butyric acid (CAS 436086-77-0)
- 3-(5-Amino-3-methyl-1H-pyrazol-1-yl)benzenesulfonic acid (CAS 23646-86-8)
- 3-Amino-N-(5-methyl-1,2-oxazol-3-yl)benzene-1-sulfonamide (CAS 954563-97-4)
- 4-Amino-2-(methylamino)-N-(5-methylisoxazol-3-yl)thiazole-5-carboxamide (CAS 664999-78-4)
- Ethyl 7-amino-2-(methylthio)-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate (CAS 90559-98-1)
Recommended Standards
- 5-[(furan-2-yl)methanesulfonyl]-2-methylpyrimidin-4-amine (CAS 882259-93-0)
- 8-Ethyl-2-(methylsulfonyl)pyrido[2,3-d]pyrimidin-7(8H)-one (CAS 211244-84-7)
- 5-(Methoxymethyl)-N-(5-methyl-1,3,4-thiadiazol-2-yl)furan-2-carboxamide (CAS 881933-24-0)
- N-((2-methyl-5-nitrophenyl)carbamothioyl)acetamide (CAS 72621-59-1)
- [2,2′-Bipyridine]-5-acetic acid (CAS 917874-25-0)
- 1-(3-Bromo-4-(dimethylamino)phenyl)ethan-1-one (CAS 142500-11-6)
- N-(4-Allyl-5-mercapto-4H-[1,2,4]triazol-3-ylmethyl)-3-methyl-benzamide (CAS 708247-76-1)
- 6-Chloro-5-iodonicotinamide (CAS 1242268-21-8)
- Methyl 2-(((trifluoromethyl)sulfonyl)oxy)cyclohex-1-enecarboxylate (CAS 93493-95-9)
- (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)(methyl)amino)-2-cyclopropylacetic acid (CAS 2642726-08-5)
- 5-Ethoxybenzofuran (CAS 861603-71-6)
- 4-Fluoro-2-(trifluoromethyl)benzo[d]thiazol-7-ol (CAS 1402003-98-8)
- Tirofiban Impurity 47 (CAS CATO-C4X-125447)
- (Des-Bromo)-Neuropeptide B (1-23) (human) (CAS 434897-64-0)
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