1-(2-Ethylphenyl)-1H-pyrrole-2,5-dione CAS 91569-16-3
| CAS No. | 91569-16-3 |
| Molecular Formula | C12H11NO2 |
| Molecular Weight | 201.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 1-(2-Ethylphenyl)-1H-pyrrole-2,5-dione.
1-(2-Ethylphenyl)-1H-pyrrole-2,5-dione (CAS 91569-16-3), molecular formula C12H11NO2 and molecular weight 201.22 g/mol, is a CATO reference standard with documented purity and traceability.
1-(2-Ethylphenyl)-1H-pyrrole-2,5-dione (C12H11NO2) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. 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).
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 | C12H11NO2 |
| Molecular Weight | 201.22 g/mol |
| Appearance | Pale yellow to 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1983 |
| Nitrogen Atoms | 1 |
Related Ethylphenyl Standards
- 5-(4-Ethylphenyl)oxazole-2-carbaldehyde (CAS 1352503-88-8)
- 1-(2-Ethylphenyl)-1H-1,2,3-triazole-4-carbaldehyde (CAS 1486425-01-7)
- 1-(4-Ethylphenyl)-1H-1,2,3-triazole-4-carbaldehyde (CAS 1490663-53-0)
- (4-Ethylphenyl)(oxazol-2-yl)methanone (CAS 898760-05-9)
- 1-(4-Ethylphenyl)-1H-pyrrole-2,5-dione (CAS 76620-00-3)
- 2-(2-Ethylphenyl)oxazole-4-carbaldehyde (CAS 885274-24-8)
- 2-(3-Ethylphenyl)oxazole-4-carbaldehyde (CAS 885273-23-4)
- 3-(4-Ethylphenyl)-4-methyl-1h-pyrazol-5-amine (CAS 1187767-20-9)
Recommended Standards
- 1-(2-Ethoxyethyl)-5-oxopyrrolidine-3-carboxylic acid (CAS 845546-18-1)
- 1-(2-Methoxyacetyl)piperidine-3-carboxylic acid (CAS 926238-94-0)
- 1-(2-Cyanoethyl)-4,6-dimethyl-2-oxo-1,2-dihydropyridine-3-carbonitrile (CAS 39088-06-7)
- 1-(2-Methoxyethyl)-6-oxopiperidine-3-carboxylic acid (CAS 915920-08-0)
- Cyclopropyl(4-pyridyl)methanone (CAS 39512-48-6)
- (E)-2-(1-(Pyridin-2-yl)ethylidene)hydrazinecarbothioamide (CAS 142564-62-3)
- 7-Chloro-benzo[d]imidazo-[2,1-b]thiazole-2-carbaldehyde (CAS 623906-25-2)
- Tenofovir disoproxil Impurity 113 (CAS CATO-C4X-1076113)
- N-Deacetyl, 1,2,3,10-demethyl Colchicine (CAS 6877-18-5)
- 8-Bromo-6-fluoro-2-methylimidazo[1,2-a]pyridine (CAS 1368743-32-1)
- (R)-tert-Butyl 3-((2-nitrophenyl)amino)pyrrolidine-1-carboxylate (CAS 1000370-76-2)
- 2-(9H-Fluorene-9-carboxamido)benzoic acid (CAS 105555-32-6)
- N-(4-Ethoxyphenyl)ethanesulfonamide (CAS 57616-19-0)
- Semaglutide impurity 48 (CAS CATO-C4X-222648)
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