4-[(1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)sulfamoyl]benzoic acid CAS 31816-70-3
| CAS No. | 31816-70-3 |
| Molecular Formula | C18H17N3O5S |
| Molecular Weight | 387.41 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-[(1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)sulfamoyl]benzoic acid (CAS 31816-70-3), molecular formula C18H17N3O5S and molecular weight 387.41 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, 4-[(1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)sulfamoyl]benzoic acid is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 387.41 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C18H17N3O5S |
| Molecular Weight | 387.41 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1966 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related dimethyl Standards
- 3-[(1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)sulfamoyl]benzoic acid (CAS 307511-52-0)
- N-[4-(2-{[(2,2-Dimethyl-4,6-dioxo-1,3-dioxan-5-yliden)methyl]amino}-1,3-thiazol-4-yl)phenyl]acetamide (CAS 497060-17-0)
- 4,6-Dimethyl-2-(2-methylpropoxy)-3-[3-(trifluoromethyl)benzenesulfonyl]pyridine (CAS 339276-76-5)
- 4,6-Dimethyl-2-(2-methylpropoxy)-3-[4-(trifluoromethyl)benzenesulfonyl]pyridine (CAS 339276-95-8)
- 5,7-Dimethyl-3-(thiophen-2-yl)-6-(3-(trifluoromethyl)benzyl)pyrazolo[1,5-a]pyrimidine (CAS 900014-82-6)
- 2-(3-(2,5-Dimethyl-1H-pyrrol-1-yl)thiophen-2-yl)-7-(trifluoromethyl)pyrazolo[1,5-a]pyrimidine-6-carbonitrile (CAS 478078-03-4)
- N-[1-(5,6-Dimethyl-1H-1,3-benzodiazol-2-yl)-2-phenylethyl]-2-fluorobenzamide (CAS 338410-76-7)
- N',3-dimethyl-N'-(3-phenyl-6-(trifluoromethyl)-1,2,4-triazin-5-yl)benzohydrazide (CAS 383148-78-5)
Recommended Standards
- 4-Methoxy-N'-(1-(6-methylpyridin-2-yl)-1H-imidazole-4-carbonyl)benzenesulfonohydrazide (CAS 478077-79-1)
- 3-((3-Nitropyridin-2-yl)thio)-5,6-diphenyl-1,2,4-triazine (CAS 866050-50-2)
- Diisopropyl (2-acetamido-9H-fluoren-9-yl)phosphonate (CAS 6344-54-3)
- 2-((4-Allyl-5-(pyridin-2-yl)-4H-1,2,4-triazol-3-yl)thio)-N-(3,4-difluorophenyl)acetamide (CAS 585559-92-8)
- 2-Fluoroimidazole HCl (CAS 42309-92-2)
- 4-Chloro-5-methylbenzene-1,2-diamine (CAS 63155-04-4)
- 20331-13-9 CTK4E3943 Propanamide,3-chloro-N-[4-(1-methylethyl)phenyl]- (CAS 20331-13-9)
- 4-(1h-Pyrazol-3-yl)phenol (CAS 68535-53-5)
- (Trimethylsilyl)methyl acrylate (CAS 67186-35-0)
- Empagliflozin Impurity 300 (CAS CATO-C4X-1065300)
- 1-(3-hydroxy-4-pyridyl)ethanone (CAS 30152-05-7)
- Fmoc-N-Me-Cys(Acm)-OH (CAS 481642-19-7)
- (2S)-Butan-2-yl2-(3-[4-[2-(diethylamino)ethoxy]-3,5-diiodobenzoyl]-1-benzofuran-2-yl)acetate (CAS 335148-45-3)
- Peptide Impurity 27 (CAS 1350456-68-6)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com