Sodium 4-chloro-3-(3-methyl-5-oxo-4-(phenyldiazenyl)-4,5-dihydro-1h-pyrazol-1-yl)benzenesulfonate CAS 6359-90-6
| CAS No. | 6359-90-6 |
| Molecular Formula | C16H12ClN4O4S |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Sodium 4-chloro-3-(3-methyl-5-oxo-4-(phenyldiazenyl)-4,5-dihydro-1h-pyrazol-1-yl)benzenesulfonate (CAS 6359-90-6) is a high-purity analytical reference standard with the molecular formula C16H12ClN4O4SNa and a molecular weight of 414.80 g/mol.
Sodium 4-chloro-3-(3-methyl-5-oxo-4-(phenyldiazenyl)-4,5-dihydro-1h-pyrazol-1-yl)benzenesulfonate (C16H12ClN4O4SNa) contains a salt form, a flavonoid core, 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, 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.
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 | C16H12ClN4O4S Na |
| Molecular Weight | 414.80 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 12.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 4 |
| Sulfur Atoms | 1 |
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Recommended Standards
- 1-Propyl-1H-imidazole-4-sulfonyl chloride (CAS 137049-03-7)
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- 6-Methyl-5-(1-tosylpiperidin-2-yl)pyridin-2(1H)-one (CAS 1352521-47-1)
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- 2-cyclobutyl-1,3-oxazole-4-carbonitrile (CAS 1190314-22-7)
- 3-amino-2-benzyl-2-methylpropan-1-ol (CAS 915796-29-1)
- Semaglutide impurity 233 (CAS CATO-C4X-2226233)
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