1-Methyl-4-nitro-1h-pyrazole-5-sulfonyl chloride CAS 1365941-03-2
| CAS No. | 1365941-03-2 |
| Molecular Formula | C4H4ClN3O4S |
| Molecular Weight | 225.61 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 1-Methyl-4-nitro-1h-pyrazole-5-sulfonyl chloride (CAS 1365941-03-2), a certified reference material (molecular formula C4H4ClN3O4S, MW 225.61 g/mol) for analytical method development and quality control.
Based on its molecular formula C4H4ClN3O4S, 1-Methyl-4-nitro-1h-pyrazole-5-sulfonyl chloride contains a carbohydrate-derived structure, an amide group, a sulfone group, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 225.61 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C4H4ClN3O4S |
| Molecular Weight | 225.61 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 methanol, ethanol, DMSO, water |
| 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) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1991 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Methyl Standards
- 1-Methyl-4-nitro-1h-imidazole-5-sulfonyl chloride (CAS 101257-84-5)
- 1-Methyl-5-nitro-1H-imidazole-4-sulfonyl chloride (CAS 101258-46-2)
- 1-Methyl-3-nitro-1h-pyrazole-4-sulfonyl chloride (CAS 1423033-93-5)
- 1-methyl-4-nitro-1H-pyrazole-3-sulfonyl chloride (CAS 1697720-32-3)
- 3-Nitro-1-octyl-1h-pyrazole (CAS 1003011-98-0)
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- 4-Nitro-1-(octan-2-yl)-1h-pyrazole (CAS 1240570-05-1)
- 1-(2-(4-Nitro-1H-pyrazol-1-yl)ethyl)piperazine (CAS 1248142-10-0)
Recommended Standards
- 1-(2-chloro-4-fluorophenyl)-1H-1,2,3-triazole-4-carbaldehyde (CAS 1423028-05-0)
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- 1-(3-chloro-4-fluorophenyl)-1H-1,2,3-triazole-4-carbaldehyde (CAS 1461708-00-8)
- 7-Chloro-8-fluoroquinoline-3-carboxylic acid (CAS 2456392-19-9)
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- 3-[(1-Imidazolyl)methyl]piperidine (CAS 915921-71-0)
- Clotrimazole EP Impurity A (CAS 66774-02-5)
- 2-Chloro-6-propylimidazo[1,2-b]pyridazine-3-sulfonamide (CAS 570416-06-7)
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