| CAS No. | 1245807-34-4 |
| Molecular Formula | C7H11ClN2O2S |
| Molecular Weight | 222.69 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Compared with other compounds in its class, the molecular weight of 222.69 g/mol gives 3-Methyl-1-propyl-1h-pyrazole-5-sulfonyl chloride distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
3-Methyl-1-propyl-1h-pyrazole-5-sulfonyl chloride (CAS 1245807-34-4), molecular formula C7H11ClN2O2S and molecular weight 222.69 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C7H11ClN2O2S, 3-Methyl-1-propyl-1h-pyrazole-5-sulfonyl chloride contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 222.69 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
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.
CATO manufactures 3-Methyl-1-propyl-1h-pyrazole-5-sulfonyl chloride under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
| Molecular Formula | C7H11ClN2O2S |
| Molecular Weight | 222.69 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 | 2 |
| Sulfur Atoms | 1 |