5-ethyl-1-methyl-1H-indole-2,3-dione CAS 852399-54-3
| CAS No. | 852399-54-3 |
| Molecular Formula | C11H11NO2 |
| Molecular Weight | 189.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 189.21 g/mol gives 5-ethyl-1-methyl-1H-indole-2,3-dione distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
5-ethyl-1-methyl-1H-indole-2,3-dione (CAS 852399-54-3), molecular formula C11H11NO2 and molecular weight 189.21 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 5-ethyl-1-methyl-1H-indole-2,3-dione (C11H11NO2) is characterized by an amino-acid-derived structure, an amide 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.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures 5-ethyl-1-methyl-1H-indole-2,3-dione 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 | C11H11NO2 |
| Molecular Weight | 189.21 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Nitrogen Atoms | 1 |
Recommended Standards
- 5-Ethoxy-3-phenylisoxazole (CAS 23244-34-0)
- 5-Ethylindole-2-carboxylic acid (CAS 37033-93-5)
- 5-Ethoxy-2-phenyloxazole (CAS 25755-93-5)
- 5-Ethylpyridine-3-sulfonyl fluoride (CAS 2137620-06-3)
- 2-(Hexylsulfanyl)ethan-1-ol (CAS 24475-56-7)
- 2-Difluoromethoxy-3-fluoro-6-(trifluoromethyl)pyridine (CAS 1214372-49-2)
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- D-Ser32-Tirzepatide (CAS CATO-CPTD788692)
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