4-(Pyrazol-1-yl)benzenesulfonic acid CAS 18336-38-4
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 18336-38-4 |
| Molecular Formula | C9H8N2O3S |
| Molecular Weight | 224.24 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-(Pyrazol-1-yl)benzenesulfonic acid (CAS 18336-38-4) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C9H8N2O3S. Molecular weight: 224.24 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C9H8N2O3S |
| Molecular Weight | 224.24 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
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Recommended Standards
- 1-Phenylpyrazole-4-sulfonic acid (CAS 18336-36-2)
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- 4-Cyano-2,5-difluorobenzoyl chloride (CAS 198280-44-3)
- 4-Chloro-7-methoxyquinazoline-6-carboxamide (CAS 2366148-94-7)
- Nemonoxacin impurity 106 (CAS CATO-C4X-3128106)
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- 3,5-Dinitro-4-pyridinol (CAS 10425-71-5)
- (S)-tert-Butyl ((1-(2-aminoacetyl)pyrrolidin-2-yl)methyl)(ethyl)carbamate (CAS 1354018-99-7)
- Endo-38a-Pro-Exenatide trifluoroacetate salt (CAS 1678416-95-9)
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