4-Benzylidene-1-methylpyrrolidine-2,3-dione CAS 35921-36-9
| CAS No. | 35921-36-9 |
| Molecular Formula | C12H15Cl2NO2 |
| Molecular Weight | 276.16 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C12H15Cl2NO2, 4-Benzylidene-1-methylpyrrolidine-2,3-dione contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 276.16 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
4-Benzylidene-1-methylpyrrolidine-2,3-dione (CAS 35921-36-9), molecular formula C12H15Cl2NO2 and molecular weight 276.16 g/mol, is a CATO reference standard with documented purity and traceability.
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 | C12H15Cl2NO2 |
| Molecular Weight | 276.16 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1967 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Benzylidene Standards
- 4-Benzylidene-2-(styryl)oxazol-5(4H)-one (CAS 40913-25-5)
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- 2-Benzylidene-1,3-dioxo-2,3-dihydro-1H-indene-5-carboxylic acid (CAS 40462-12-2)
- 2-Benzylidene-6-((5-methylfuran-2-yl)methylene)cyclohexanone (CAS 880098-64-6)
- 4-(4-Benzylidene-2,3-dioxopyrrolidin-1-yl)butanoic acid (CAS 76628-86-9)
- (Z)-4-Benzylidene-3-(phenoxymethyl)isoxazol-5(4H)-one (CAS 112082-71-0)
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Recommended Standards
- 2,4-Dichloro-N-hexylpyrimidine-5-carboxamide (CAS 54127-86-5)
- 5-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)benzo[d]thiazol-2-amine (CAS 2043401-94-9)
- 2,3-Bis(4-chlorophenyl)propanenitrile (CAS 36770-81-7)
- 5,10-Dioxo-5H,10H-diimidazo[1,5-a:1',5'-d]pyrazine-1,6-dicarboxylic Acid (CAS 77015-05-5)
- 4-Bromo-5-isobutoxy-2-nitroaniline (CAS 1255574-43-6)
- 4-(2-(4-Methoxyphenyl)-2-phenylvinyl)-N,N-diphenylaniline (CAS 97931-99-2)
- Avenanthramide D (CAS 115610-36-1)
- 4,4-dimethylcyclohexene-1-carboxylic acid (CAS 854720-02-8)
- 3-Methyl-2-(4-methylphenyl)quinoline-4-carbonyl chloride (CAS 1160264-93-6)
- (1-methanesulfonylazetidin-3-yl)methanesulfonyl chloride (CAS 1934917-04-0)
- 2-(3-Nitrophenyl)-4-(2-hydroxyphenyl)thiazole (CAS 1965304-93-1)
- 2,4-Difluoro-3-methylbenzenesulfonyl chloride (CAS 1349717-93-6)
- 1-Bromo-2,4-dichloro-5-(trifluoromethyl)benzene (CAS 393-45-3)
- Semaglutide impurity 29 (CAS 1188328-22-4)
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