1-Methyl-2-oxoindoline-7-carboxylic acid CAS 933698-51-2
| CAS No. | 933698-51-2 |
| Molecular Formula | C10H9NO3 |
| Molecular Weight | 191.18 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.
1-Methyl-2-oxoindoline-7-carboxylic acid (CAS 933698-51-2), molecular formula C10H9NO3 and molecular weight 191.18 g/mol, is a CATO reference standard with documented purity and traceability.
1-Methyl-2-oxoindoline-7-carboxylic acid (C10H9NO3) 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 high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 | C10H9NO3 |
| Molecular Weight | 191.18 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 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.) | 1987 |
| Nitrogen Atoms | 1 |
Related Methyl Standards
- 1-Methyl-2-oxoindoline-6-carboxylic Acid (CAS 138328-27-5)
- 7-Methyl-2-oxoindoline-5-carboxylic acid (CAS 167627-04-5)
- 2-Oxoindoline-5-carbonyl chloride (CAS 1417709-94-4)
- 1-Acetyl-2-oxoindoline-6-carbonitrile (CAS 651747-73-8)
- 2-Oxoindoline-5-carboxylic Acid (CAS 102359-00-2)
- 2-Oxoindoline-4-carboxylic Acid (CAS 90322-37-5)
- 2-Oxoindoline-7-carboxylic Acid (CAS 25369-43-1)
- 3-Oxoindoline-2-carboxylic acid (CAS 708-38-3)
Recommended Standards
- 1-Methoxyindole-3-carboxylic acid (CAS 91913-76-7)
- 1-Oxo-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid (CAS 63586-82-3)
- 1-ethyl-3,1-benzoxazine-2,4-dione (CAS 50332-68-8)
- 1-Oxo-1,2,3,4-tetrahydroisoquinoline-6-carboxylic acid (CAS 933752-38-6)
- 2-Chloro-3-(cyanomethyl)benzoic acid (CAS 1179338-45-4)
- 1-Bromo-5-iodo-4-methoxy-2-(trifluoromethyl)benzene (CAS 2241588-80-5)
- 8-ethylquinoline-3-carbaldehyde (CAS 1781833-59-7)
- 3-(5-Cyclopropyl-4H-1,2,4-triazol-3-yl)piperidinedihydrochloride (CAS 1332530-88-7)
- (3-Bromo-5-(piperidin-4-yl)phenyl)boronic acid (CAS 2225179-83-7)
- 1-(3-Amino-4-fluorophenyl)imidazolidin-2-one (CAS 1042555-85-0)
- n-(4-Fluorophenyl)cyclopropanecarboxamide (CAS 2354-89-4)
- 2-methoxy-N-(2-methylpropyl)pyridin-4-amine (CAS 1550922-57-0)
- Methyl N-(2-ethoxyphenyl)-N-(methylsulfonyl)glycinate (CAS 333458-44-9)
- D-Ser12-Semaglutide (CAS CATO-C4X-2226240)
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