6-acetyl-1H-indole-2-carboxylic acid CAS 81223-71-4
| CAS No. | 81223-71-4 |
| Molecular Formula | C11H9NO3 |
| Molecular Weight | 203.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies 6-acetyl-1H-indole-2-carboxylic acid (CAS 81223-71-4), a certified reference material (molecular formula C11H9NO3, MW 203.19 g/mol) for analytical method development and quality control.
6-acetyl-1H-indole-2-carboxylic acid (C11H9NO3) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C11H9NO3 |
| Molecular Weight | 203.19 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1980 |
| Nitrogen Atoms | 1 |
Recommended Standards
- 5-Methoxyquinoline-8-carboxylic acid (CAS 64507-37-5)
- 6-amino-4-hydroxy-2-naphthoic acid (CAS 64955-20-0)
- 5-Methoxyquinoline-2-carboxylic acid (CAS 852402-70-1)
- 6-Hydroxy-2-methylquinoline-4-carboxylic acid (CAS 50741-53-2)
- 2,3-Dihydroxybenzamide (CAS 13189-89-4)
- tert-Butyl (2-methylpent-4-en-2-yl)carbamate (CAS 1416439-17-2)
- N-(4-Methoxyphenyl)-5-nitrofuran-3-carboxamide (CAS 122060-90-6)
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- 2-((tert-Butoxycarbonyl)amino)isonicotinic acid (CAS 365412-92-6)
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- O-(3-(trifluoromethyl)phenyl)hydroxylamine (CAS 99907-98-9)
- Semaglutide Impurity 122 (CAS CATO-C4X-2226122)
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