Ethyl 5-amino-3-(methylthio)-1-phenyl-1H-pyrazole-4-carboxylate CAS 40745-03-7
| CAS No. | 40745-03-7 |
| Molecular Formula | C12H13N3O2S |
| Molecular Weight | 263.32 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Ethyl 5-amino-3-(methylthio)-1-phenyl-1H-pyrazole-4-carboxylate (CAS 40745-03-7), a certified reference material (molecular formula C12H13N3O2S, MW 263.32 g/mol) for analytical method development and quality control.
Ethyl 5-amino-3-(methylthio)-1-phenyl-1H-pyrazole-4-carboxylate (C12H13N3O2S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; 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).
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.
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 | C12H13N3O2S |
| Molecular Weight | 263.32 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| 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 |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1968 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
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Recommended Standards
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- 7-(hydroxymethyl)-5H-pyrimido[2,1-b][1,3]thiazol-5-one (CAS 85811-77-4)
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