1-(2-Chlorophenyl)-5-(thiophen-2-yl)-1H-pyrazole CAS 1269291-36-2
| CAS No. | 1269291-36-2 |
| Molecular Formula | C13H9ClN2S |
| Molecular Weight | 260.74 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures 1-(2-Chlorophenyl)-5-(thiophen-2-yl)-1H-pyrazole 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.
1-(2-Chlorophenyl)-5-(thiophen-2-yl)-1H-pyrazole (CAS 1269291-36-2) is a high-purity analytical reference standard with the molecular formula C13H9ClN2S and a molecular weight of 260.74 g/mol.
Owing to a nitrogen-containing heterocyclic scaffold, a nitrile group, sulfur-containing functionality, chlorine substitution, 1-(2-Chlorophenyl)-5-(thiophen-2-yl)-1H-pyrazole is typically pale yellow to yellow low-melting solid. Its solid-state physicochemical attributes — including a molecular weight of 260.74 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 | C13H9ClN2S |
| Molecular Weight | 260.74 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, 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 |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Chlorophenyl Standards
- 2-(3-Chlorophenyl)benzo[d]thiazol-6-amine (CAS 1267224-50-9)
- 1-(2-Chlorophenyl)-5-(thiophen-3-yl)-1H-pyrazole (CAS 1269291-47-5)
- 1-(4-Chlorophenyl)-5-(thiophen-2-yl)-1H-pyrazole (CAS 1269294-00-9)
- 1-(3-Chlorophenyl)-5-(thiophen-2-yl)-1H-pyrazole (CAS 1269294-21-4)
- (2E)-3-[(4-Chlorophenyl)amino]-2-(thiophen-3-yl)prop-2-enenitrile (CAS 477851-21-1)
- 1-((2-Chlorophenyl)sulfonyl)piperazine (CAS 233261-84-2)
- 1-(4-Chlorophenyl)-2-(propane-2-sulfonyl)ethan-1-one (CAS 344267-26-1)
- 2-(4-Chlorophenyl)-1,3-benzothiazol-6-amine (CAS 53544-78-8)
Recommended Standards
- 4-Chloro-2-methyl-7-phenylthieno[3,2-d]pyrimidine (CAS 1267382-72-8)
- 4-Chloro-2-methyl-6-phenylthieno[2,3-d]pyrimidine (CAS 125660-99-3)
- 4-((2-Chloropyridin-3-yl)methyl)thiomorpholine 1,1-dioxide (CAS 1249769-71-8)
- 3-(Benzyloxy)cyclobutane-1-sulfonyl chloride (CAS 1303510-64-6)
- 3-Pyridinecarbonitrile, 1,2-dihydro-1-methyl-2-oxo-5-phenyl- (CAS 130879-54-8)
- N-((3-Methoxythiophen-2-yl)methylene)-2,6-dimethylaniline (CAS 100304-95-8)
- 2-Chloro-1-(3-chloro-5-fluorophenyl)-2,2-difluoroethan-1-one (CAS 1352224-41-9)
- 2,2'-(1,2-Phenylene)bis[4,4,5,5-tetramethyl-1,3,2-dioxaborolane] (CAS 269410-07-3)
- Vitamin A Impurity 21 (CAS CATO-C4X-218721)
- 3-Bromomethyl-2-chloro-5-(trifluoromethyl)pyridine (CAS 1227588-09-1)
- 1,4-Diphenylnaphthalene (CAS 796-30-5)
- Tetrakis[μ-(acetato-O:O')]diRuthenium (Ru-Ru) (CAS 30553-94-7)
- 1-(2-fluorobenzyl)-1H-pyrazol-3-amine,HCl (CAS 1158592-31-4)
- Semaglutide impurity 290 (CAS CATO-C4X-2226290)
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