Product name: Diethyl ethoxymethylenemalonate (EMME / DEEMM)
CAS No.: 87-13-8
EC No.: 201-725-7Synonyms: Diethyl 2-(ethoxymethylene)malonate, Ethoxymethylenemalonic acid diethyl ester
Molecular Formula: C10H16O5
Molecular Weight: 216.23SMILES: CCO\C=C(\C(=O)OCC)C(=O)OCC
Typical Physical & Chemical Properties
Melting Point: -33 ℃
Boiling Point: 279 ~ 283 ℃ (760 mmHg); 166 ℃ (19 mmHg)
Flash Point (Closed Cup): 155 ℃
Odor: Mild characteristic ester odor
Solubility: Insoluble in water; miscible with ethanol, methanol, chloroform, toluene and other organic solventsStability: Stable under normal ambient conditions. Incompatible with strong acids, strong alkalis and strong oxidants
Quality Specifications
| Item | Specification | Test Method |
|---|---|---|
| Appearance | Colorless to pale yellow clear liquid | Visual Inspection |
| Assay (GC) | ≥98.0 % | Gas Chromatography |
| Color (Pt-Co) | ≤50 Hazen | Platinum-Cobalt Method |
| Refractive Index (n₂₀ᴰ) | 1.4610 ~ 1.4640 | Refractometer |
| Density (20 ℃) | 1.078 ~ 1.082 g/mL | Pycnometer |
| Water Content (KF) | ≤0.15 % | Karl Fischer Titration |
| Free Acid | ≤0.10 % | Potentiometric Titration |
| Evaporation Residue | ≤0.01 % | Gravimetry |
Product Characteristics
- Highly active Michael acceptor containing conjugated double bond and two ester groups, widely applied for cyclization condensation reactions.- Core raw material for Gould-Jacobs reaction to construct quinoline ring structures.
- Key building block for synthesis of quinolone antibacterial APIs and heterocyclic fine chemicals.
- Low volatility at room temperature, convenient for feeding in continuous organic synthesis processes.
Applications
- Pharmaceutical intermediate for quinolone antibacterial agents.
- Fine chemical intermediate, used in dyestuff and organic pigment synthesis
- Derivatization reagent for amino acid analysis in chromatography
Handling & Storage
Store in tightly sealed HDPE / steel drums, cool, dry and well-ventilated warehouse.
Storage temperature below 30 ℃; avoid direct sunlight and overheating.
Separate from strong oxidants, strong acids and strong bases.
Prevent prolonged skin contact and vapor inhalation; wear chemical resistant gloves and safety goggles during operation.
Shelf life: 24 months under recommended storage conditions.
Packaging
200 L steel drum / 25 kg plastic drum
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