5-iodo-1-methyl-1H-pyrazole-4-sulfonyl chloride CAS 1855907-05-9
| CAS No. | 1855907-05-9 |
| Molecular Formula | C4H4ClIN2O2S |
| Molecular Weight | 306.51 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 5-iodo-1-methyl-1H-pyrazole-4-sulfonyl chloride 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.
CATO supplies 5-iodo-1-methyl-1H-pyrazole-4-sulfonyl chloride (CAS 1855907-05-9), a certified reference material (molecular formula C4H4ClIN2O2S, MW 306.51 g/mol) for analytical method development and quality control.
The molecular framework of 5-iodo-1-methyl-1H-pyrazole-4-sulfonyl chloride (C4H4ClIN2O2S) is characterized by an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine/iodine 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. 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.
Physical & Chemical Properties
| Molecular Formula | C4H4ClIN2O2S |
| Molecular Weight | 306.51 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1995 |
| Halogen Content | Cl/I-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
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