3-(N-Methyl-N-phenylsulfamoyl)-1H-pyrazole-4-carboxylic acid CAS 155144-45-9
| CAS No. | 155144-45-9 |
| Molecular Formula | C11H11N3O4S |
| Molecular Weight | 281.29 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 3-(N-Methyl-N-phenylsulfamoyl)-1H-pyrazole-4-carboxylic acid meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
3-(N-Methyl-N-phenylsulfamoyl)-1H-pyrazole-4-carboxylic acid (CAS 155144-45-9), molecular formula C11H11N3O4S and molecular weight 281.29 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 3-(N-Methyl-N-phenylsulfamoyl)-1H-pyrazole-4-carboxylic acid (C11H11N3O4S) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
Physical & Chemical Properties
| Molecular Formula | C11H11N3O4S |
| Molecular Weight | 281.29 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2001 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Recommended Standards
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- Methyl 1-tosyl-1H-1,2,4-triazole-3-carboxylate (CAS 1346809-32-2)
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