4-Chloro-1,3-dimethyl-1h-pyrazole-5-sulfonyl chloride CAS 88398-87-2
| CAS No. | 88398-87-2 |
| Molecular Formula | C5H6Cl2N2O2S |
| Molecular Weight | 229.08 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 229.08 g/mol gives 4-Chloro-1,3-dimethyl-1h-pyrazole-5-sulfonyl chloride distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies 4-Chloro-1,3-dimethyl-1h-pyrazole-5-sulfonyl chloride (CAS 88398-87-2), a certified reference material (molecular formula C5H6Cl2N2O2S, MW 229.08 g/mol) for analytical method development and quality control.
Owing to an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, 4-Chloro-1,3-dimethyl-1h-pyrazole-5-sulfonyl chloride is typically white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 229.08 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 4-Chloro-1,3-dimethyl-1h-pyrazole-5-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.
Physical & Chemical Properties
| Molecular Formula | C5H6Cl2N2O2S |
| Molecular Weight | 229.08 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.) | 1982 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Chloro Standards
- 4-Chloro-1-ethyl-1h-pyrazole-5-sulfonyl chloride (CAS 1245822-74-5)
- 5-Chloro-1-ethyl-1h-pyrazole-4-sulfonyl chloride (CAS 1427022-70-5)
- (4-Chloro-1-methyl-1H-pyrazol-3-yl)methanesulfonyl chloride (CAS 2245066-84-4)
- 3-Chloro-5-fluorobenzenesulfonyl chloride (CAS 1131397-73-3)
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- 7-Chloro-2-(chloromethyl)pyrido[1,2-a]pyrimidin-4-one (CAS 162469-87-6)
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Recommended Standards
- 4-(5,5-Dimethyl-1,3,2-dioxaborinan-2-yl)-3-methyl-benzonitrile (CAS 2231089-47-5)
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- 3-(4,4,6-trimethyl-1,3,2-dioxaborinan-2-yl)benzonitrile (CAS 934558-35-7)
- 3-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)benzonitrile (CAS 214360-46-0)
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- tert-Butyl 3-(((6-chloropyridazin-3-yl)amino)methyl)piperidine-1-carboxylate (CAS 1065485-12-2)
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