2-(1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)propanoic acid CAS 21860-84-4
| CAS No. | 21860-84-4 |
| Molecular Formula | C11H9NO4 |
| Molecular Weight | 219.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 219.19 g/mol gives 2-(1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)propanoic acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
2-(1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)propanoic acid (CAS 21860-84-4) is a high-purity analytical reference standard with the molecular formula C11H9NO4 and a molecular weight of 219.19 g/mol.
2-(1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)propanoic acid (C11H9NO4) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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.
Physical & Chemical Properties
| Molecular Formula | C11H9NO4 |
| Molecular Weight | 219.19 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.) | 1963 |
| Nitrogen Atoms | 1 |
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Recommended Standards
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- 4-Methoxy-N-(pyridin-3-ylmethyl)butan-1-amine (CAS 1247569-42-1)
- Valsartan Impurity 100 (CAS CATO-C4X-1057100)
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- tert-Butyl 3-(7-hydroxypyrazolo[1,5-a]pyrimidin-5-yl)piperidine-1-carboxylate (CAS 891494-66-9)
- Methyl 4-(4-cyanophenyl)-2-fluorobenzoate (CAS 1365272-59-8)
- Des-Leu26-Tirzepatide (CAS CATO-CPTD788947)
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