2-Ethyl-5-nitroindazole CAS 5228-50-2
| CAS No. | 5228-50-2 |
| Molecular Formula | C21H19NO2S3 |
| Molecular Weight | 413.58 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.
2-Ethyl-5-nitroindazole (CAS 5228-50-2), molecular formula C21H19NO2S3 and molecular weight 413.58 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 2-Ethyl-5-nitroindazole (C21H19NO2S3) is characterized by a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
CATO manufactures 2-Ethyl-5-nitroindazole under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C21H19NO2S3 |
| Molecular Weight | 413.58 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 3 |
Related Ethyl Standards
- 5-Nitroindazole-1-carboxylic acid tert-butyl ester (CAS 129488-09-1)
- 6-Nitroindazole-3-carboxylic acid, 97% (CAS 857801-97-9)
- 3-Methyl-6-nitroindazole (CAS 6494-19-5)
- 5-Methyl-6-nitroindazole (CAS 72521-00-7)
- 5-Nitroindazole (CAS 5401-94-5)
- 7-Nitroindazole (CAS 2942-42-9)
- 7-Nitroindazole (sodium) (CAS 161467-34-1)
Recommended Standards
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- 4-Methylpyrazolidin-3-one (CAS 10234-74-9)
- Ethyl 1-benzyl-4-ethylpyrrolidine-3-carboxylate (CAS 1823540-45-9)
- 4-[(4-acetylpiperazin-1-yl)sulfonyl]benzoic acid (CAS 881932-99-6)
- 3-(3-Bromophenyl)-1,1,1-trifluoropropan-2-one (CAS 898787-59-2)
- 3-([1,2,3]Thiadiazol-5-ylsulfanyl)-propionic acid ethyl ester (CAS 93091-09-9)
- 1-(3-Methoxyphenyl)-3-(m-tolyl)propan-1-one (CAS 898790-39-1)
- 2-Chloro-1-(2,5-dimethoxyphenyl)-2,2-difluoroethan-1-one (CAS 1352214-10-8)
- 1-Bromo-9H-fluorene (CAS 28314-04-7)
- Semaglutide impurity 247 (CAS CATO-C4X-2226247)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com