3-(Hydroxyimino)-5-methylindolin-2-one CAS 13208-98-5
| CAS No. | 13208-98-5 |
| Molecular Formula | C9H8N2O2 |
| Molecular Weight | 176.17 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 3-(Hydroxyimino)-5-methylindolin-2-one meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
3-(Hydroxyimino)-5-methylindolin-2-one (CAS 13208-98-5) is a high-purity analytical reference standard with the molecular formula C9H8N2O2 and a molecular weight of 176.17 g/mol.
The molecular framework of 3-(Hydroxyimino)-5-methylindolin-2-one (C9H8N2O2) 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 the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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.
Physical & Chemical Properties
| Molecular Formula | C9H8N2O2 |
| Molecular Weight | 176.17 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°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 |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1960 |
| Nitrogen Atoms | 2 |
Related Hydroxyimino Standards
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Recommended Standards
- 1-Methyl-1H-pyrrolo[3,2-c]pyridine-6-carboxylic acid (CAS 1324002-79-0)
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- 3-(4-Formylphenoxy)propanenitrile (CAS 1175880-44-0)
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- 3-(Benzyloxy)-2-methylpropan-1-amine hydrochloride (CAS 1349186-05-5)
- 1-(Phenylthio)propan-2-amine (CAS 2014-77-9)
- Methyl 4-ethyl-2,6-dimethylpyrimidine-5-carboxylate (CAS 832090-49-0)
- tert-Butyl 2-(4-hydroxypiperidin-4-yl)acetate (CAS 180532-52-9)
- 5-Oxo-1-(tert-pentyl)pyrrolidine-3-carboxylic acid (CAS 944683-26-5)
- 2-(3-Ethoxy-4-fluorophenyl)ethan-1-ol (CAS 1378819-19-2)
- 4-(3-Hydroxyphenyl)-1H-pyrazolo[3,4-b]pyridine-6-carboxamide (CAS 918132-92-0)
- endo-Ser39-Tirzepatide (CAS CATO-CPTD788935)
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