1,4-Dimethyl-1H-pyrazole-5-sulfonyl chloride CAS 1174834-52-6
| CAS No. | 1174834-52-6 |
| Molecular Formula | C5H11ClN2O2S |
| Molecular Weight | 198.67 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 1,4-Dimethyl-1H-pyrazole-5-sulfonyl chloride (CAS 1174834-52-6), a certified reference material (molecular formula C5H11ClN2O2S, MW 198.67 g/mol) for analytical method development and quality control.
Structurally, 1,4-Dimethyl-1H-pyrazole-5-sulfonyl chloride (C5H11ClN2O2S) contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 1.0, corresponding to approximately 1 ring(s) or double-bond equivalent(s). With a molecular weight of 198.67 g/mol, it falls into the medium-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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.
As a certified reference material (CRM), 1,4-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 | C5H11ClN2O2S |
| Molecular Weight | 198.67 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 | Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 1.0 |
| CAS Registry Year (est.) | 1989 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Dimethyl Standards
- 1,5-dimethyl-1H-pyrazole-4-sulfonyl chloride (CAS 1005613-94-4)
- 2,5-Dimethyl-2,4,5,6-tetrahydrocyclopenta[c]pyrazole-3-carbonyl chloride (CAS 132529-87-4)
- 2,6-Dimethyl-2,4,5,6-tetrahydrocyclopenta[c]pyrazole-3-carbonyl chloride (CAS 146979-79-5)
- 3,5-Dimethyl-4-methoxybenzoyl chloride (CAS 21668-34-8)
- Dimethyl 2-chloro-3-fluorosuccinate (CAS 76937-39-8)
- Dimethyl(4-thiomethylphenyl)silanol (CAS 1244855-89-7)
- 2,2-Dimethyl-N-(2-(piperidin-1-yl)ethyl)propan-1-amine (CAS 1192122-09-0)
- 4,4-Dimethyl-2-(piperidin-2-yl)pentan-1-amine (CAS 1306606-01-8)
Recommended Standards
- (7-Chlorobenzo[b]thiophen-2-yl)methanol (CAS 1171926-62-7)
- 4-Chloro-N-methyl-2-benzothiazolamine (CAS 118221-28-6)
- 6-Chloro-5-methyl-1,2-benzisothiazol-3-amine (CAS 1126424-36-9)
- 2-chloropyridine-4-sulfonamide (CAS 1182767-38-9)
- 3-(2,4-Dimethoxyphenyl)-1-methyl-1h-pyrazol-5-amine (CAS 1152666-89-1)
- 1-[(4-Chlorophenyl)methyl]-6-oxo-N-[4-(trifluoromethyl)phenyl]-1,6-dihydropyridine-3-carboxamide (CAS 338782-71-1)
- 3-((4-Aminophenyl)sulfonyl)propanenitrile (CAS 84362-27-6)
- Hydroxy-PEG3-DBCO (CAS 2566404-76-8)
- 3-Nitro Ropivacaine (CAS 247061-07-0)
- n-Cyclopentyl-2,3-dihydro-1h-inden-5-amine (CAS 1019603-20-3)
- (S)-6-chlorochromane-3-carboxylic acid (CAS 164265-09-2)
- Gsk2807 (CAS 2245255-65-4)
- (E)-4-(4-(Dimethylamino)phenyl)but-3-en-2-one (CAS 30625-58-2)
- Semaglutide Impurity 1(OtBu-Ste-D-γGlu(OtBu)-AEEA-AEEA-OH) (CAS CATO-C4X-22261)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com