3-Methyl-1-(4-phenyl-2-thiazolyl)-1H-Pyrazole-4,5-dione 4-[2-(2-Ethoxyphenyl)hydrazone] CAS 331244-89-4
| CAS No. | 331244-89-4 |
| Molecular Formula | C21H19N5O2S |
| Molecular Weight | 405.47 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 3-Methyl-1-(4-phenyl-2-thiazolyl)-1H-Pyrazole-4,5-dione 4-[2-(2-Ethoxyphenyl)hydrazone] 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.
3-Methyl-1-(4-phenyl-2-thiazolyl)-1H-Pyrazole-4,5-dione 4-[2-(2-Ethoxyphenyl)hydrazone] (CAS 331244-89-4) is a high-purity analytical reference standard with the molecular formula C21H19N5O2S and a molecular weight of 405.47 g/mol.
Owing to a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, 3-Methyl-1-(4-phenyl-2-thiazolyl)-1H-Pyrazole-4,5-dione 4-[2-(2-Ethoxyphenyl)hydrazone] is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 405.47 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
Physical & Chemical Properties
| Molecular Formula | C21H19N5O2S |
| Molecular Weight | 405.47 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°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) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 5 |
| Sulfur Atoms | 1 |
Recommended Standards
- 3-Hydroxy-1-(5-methyl-1,3,4-thiadiazol-2-yl)-4-(4-methylbenzoyl)-5-(p-tolyl)-1H-pyrrol-2(5H)-one (CAS 371139-87-6)
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