1-(3-Chlorophenyl)-3-methyl-1H-thieno[2,3-c]pyrazole-5-carboxylic acid CAS 565171-07-5
| CAS No. | 565171-07-5 |
| Molecular Formula | C13H9ClN2O2S |
| Molecular Weight | 292.74 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 1-(3-Chlorophenyl)-3-methyl-1H-thieno[2,3-c]pyrazole-5-carboxylic acid (CAS 565171-07-5), a certified reference material (molecular formula C13H9ClN2O2S, MW 292.74 g/mol) for analytical method development and quality control.
1-(3-Chlorophenyl)-3-methyl-1H-thieno[2,3-c]pyrazole-5-carboxylic acid (C13H9ClN2O2S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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.
CATO manufactures 1-(3-Chlorophenyl)-3-methyl-1H-thieno[2,3-c]pyrazole-5-carboxylic acid 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.
Physical & Chemical Properties
| Molecular Formula | C13H9ClN2O2S |
| Molecular Weight | 292.74 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1984 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
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Recommended Standards
- 1-(4-Chlorobenzenesulfonyl)-1H-pyrrolo[2,3-b]pyridine (CAS 477857-52-6)
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Why CATO?
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