3-(4-Chloro-2-fluoro-5-methoxyphenyl)-5-(methylthio)-1H-pyrazole CAS 141577-01-7
| CAS No. | 141577-01-7 |
| Molecular Formula | C11H10ClFN2OS |
| Molecular Weight | 272.73 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-(4-Chloro-2-fluoro-5-methoxyphenyl)-5-(methylthio)-1H-pyrazole (CAS 141577-01-7), molecular formula C11H10ClFN2OS and molecular weight 272.73 g/mol, is a CATO reference standard with documented purity and traceability.
3-(4-Chloro-2-fluoro-5-methoxyphenyl)-5-(methylthio)-1H-pyrazole (C11H10ClFN2OS) contains a nitrogen-containing heterocyclic scaffold, an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage, fluorine/chlorine substitution. Halogen substitution raises its density and boiling point, its high carbon-to-hydrogen ratio confers good lipid solubility; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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), 3-(4-Chloro-2-fluoro-5-methoxyphenyl)-5-(methylthio)-1H-pyrazole 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 | C11H10ClFN2OS |
| Molecular Weight | 272.73 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1997 |
| Halogen Content | F/Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
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Recommended Standards
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- 2-(4-(((9H-fluoren-9-yl)methoxy)carbonyl)-2-oxopiperazin-1-yl)acetic acid (CAS 738625-30-4)
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- 5,6-Dimethyl-2,3-diphenylbenzofuran (CAS 14770-93-5)
- endo-Ser39-Tirzepatide (CAS CATO-CPTD788935)
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