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Technical Specs
Test Specifications
| Test Item | Standard |
|---|---|
| Content (GC) % | 99.00% Min. |
| Refractive Index | 1.4610-1.4630 |
| Moisture % | 0.5% Max. |
| Color (Hazen) | 40 Max. |
| Specific gravity (g/cm³, 20°C) | 1.070-1.085 |
| Appearance | Colorless transparent viscous liquid |
Basic Information
| Product Alias | Diethyl Ethoxymethylenemalonate (DEEMM) |
| English Name | Diethyl Ethoxymethylene Malonate |
| Molecular Formula | C₁₀H₁₆O₅ |
| Molecular Weight | 216.23 |
| CAS No. | 87-13-8 |
| Packaging | 250 kg drum, 1250 kg IBC tote, or as per customer request. |
| Storage | Store in a cool place, keep container tightly closed, store in a dry, ventilated area |
Product Description
Product Overview
Diethyl Ethoxymethylene Malonate is a colorless transparent viscous liquid, CAS 87-13-8, molecular formula C₁₀H₁₆O₅, molecular weight 216.23, content (GC) ≥99.00%. It is an important pharmaceutical intermediate.
Product Features
- Purity (GC) ≥99.00%, guaranteed high purity
- Water content ≤0.5%, low water content ensures stability
- Color (Hazen) ≤40, transparent and colorless appearance
- Refractive index 1.4610-1.4630, stable and controllable quality indicators.
- Specific gravity 1.070-1.085 (20°C), physically stable
- Widely used in pharmaceutical synthesis
Chemical Properties
Diethyl ethoxymethylene malonate is an unsaturated carboxylic ester compound containing an active methylene group. The ethoxymethylene group in its structure has high reactivity, allowing it to participate in various organic synthesis reactions such as Michael addition and Knoevenagel condensation. This compound has significant application value in pharmaceutical intermediate synthesis.
Applications
Pharmaceutical Manufacturing
As an important pharmaceutical intermediate, it is used to synthesize various active drug molecules, such as quinolone antibacterials and pyrimidine compounds.
Organic Synthesis
Used as an organic synthesis intermediate in reactions such as Michael addition and Knoevenagel condensation to synthesize heterocyclic compounds containing pyridine and pyrimidine rings.
Pesticide Intermediate
Can be used to synthesize certain pesticide active ingredients with application value in agrochemicals.
Fine Chemicals
Used in fine chemicals to synthesize functional molecules such as UV absorbers and light stabilizers.
- Store in a cool place and keep container tightly closed
- Store in a dry, ventilated place
- Avoid high temperature and direct sunlight
FAQ
The content of Diethyl Ethoxymethylene Malonate (GC) in this product is ≥99.00%, tested by gas chromatography to ensure high purity. Each batch is strictly tested before shipment and meets quality standards.
Product refractive index (20°C) is 1.4610-1.4630, specific gravity is 1.070-1.085 g/cm³. These two physical parameters are important indicators for product quality control; measured values within the specified range indicate stable product purity and quality.
The moisture content of this product is ≤0.5% (Max.), determined by the Karl Fischer method. Low moisture content is crucial for the stability of pharmaceutical intermediates, preventing hydrolysis during storage and use, and ensuring consistent product quality.
Color (Hazen) ≤40 is an indicator of product transparency. The lower the Hazen value, the more transparent the product. This product is a colorless transparent viscous liquid with low color, indicating high purity with minimal or no impurities and colored substances.
The molecular formula of diethyl ethoxymethylene malonate is C₁₀H₁₆O₅, molecular weight 216.23. Its structure contains two ethoxycarbonyl groups (-COOC₂H₅) and one ethoxymethylene group (-CH=CH-OCH₂CH₃). This unsaturated ester structure gives it high reactivity, enabling participation in various condensation and addition reactions.
The active methylene group (-CH=CH-O-) in diethyl ethoxymethylene malonate can react with various nucleophiles, including condensation with amines to form pyridine derivatives, Michael addition with active methylene compounds, and Knoevenagel condensation with carbonyl compounds. These reactions have significant applications in heterocyclic synthesis.
Under proper storage conditions (cool, dry, sealed container), the product shelf life is over 12 months. It is recommended to store indoors at 15-25°C, away from direct sunlight and high temperatures. Keep container sealed to prevent moisture absorption and evaporation.
As an organic solvent product, operate in a well-ventilated environment. Avoid prolonged skin contact; if contact occurs, rinse immediately with plenty of water. Product is a flammable liquid; keep away from ignition sources. Refer to the product MSDS for specific safety information.
Diethyl Ethoxymethylene Malonate is soluble in various organic solvents, including ethanol, ether, acetone, ethyl acetate, chloroform, etc. It is sparingly soluble in water. As an ester compound, hydrolysis may occur under strong acid or strong base conditions.
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