4-Chloro-2-(methylsulfanyl)pyrazolo[1,5-a][1,3,5]triazine CAS 54346-19-9
| CAS No. | 54346-19-9 |
| Molecular Formula | C6H5ClN4S |
| Molecular Weight | 200.65 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
4-Chloro-2-(methylsulfanyl)pyrazolo[1,5-a][1,3,5]triazine (CAS 54346-19-9) is a high-purity analytical reference standard with the molecular formula C6H5ClN4S and a molecular weight of 200.65 g/mol.
4-Chloro-2-(methylsulfanyl)pyrazolo[1,5-a][1,3,5]triazine (C6H5ClN4S) contains a nitrile group, sulfur-containing functionality, chlorine substitution, an aromatic ring system. Halogen substitution raises its density and boiling point; 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).
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 | C6H5ClN4S |
| Molecular Weight | 200.65 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1972 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 4 |
| Sulfur Atoms | 1 |
Related Chloro Standards
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Recommended Standards
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- 5-((1h-1,2,4-Triazol-1-yl)methyl)-2-chlorothiazole (CAS 478081-35-5)
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- 5-Nitro-N-(pyrrolidin-3-yl)pyridin-2-amine (CAS 1250987-21-3)
- 1,2-Bis(4-(dimethylamino)phenyl)ethane-1,2-dione (CAS 17078-27-2)
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- Tirzepatide Impurity 51 (CAS CATO-C4X-324051)
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