N-cyclopentyl-N,3,5-trimethyl-1H-pyrazole-4-sulfonamide dihydrochloride CAS 1231963-81-7
| CAS No. | 1231963-81-7 |
| Molecular Formula | C11H19N3O2S |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
N-cyclopentyl-N,3,5-trimethyl-1H-pyrazole-4-sulfonamide dihydrochloride (CAS 1231963-81-7) is a high-purity analytical reference standard with the molecular formula C11H19N3O2SHCl and a molecular weight of 293.81 g/mol.
The molecular framework of N-cyclopentyl-N,3,5-trimethyl-1H-pyrazole-4-sulfonamide dihydrochloride (C11H19N3O2SHCl) is characterized by an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution. 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. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C11H19N3O2S 2*HCl |
| Molecular Weight | 293.81 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related N Standards
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- (E)-3-(dimethylamino)-1-(thiophen-2-yl)but-2-en-1-one (CAS 112677-16-4)
- 2-Chloro-n-(4-methyl-3-sulfamoylphenyl)acetamide (CAS 885461-12-1)
- Insulin Degludec Impurity 19 (CAS CATO-C4X-215719)
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