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Basic information 

Product name: diethyl malonate
CAS No.: 105-53-3;145601-68-9
EINECS No.: 203-305-9
Molecular formula: C₇H₁₂O₄
Molecular weight: 160.17
Physical and chemical properties 
Main components: Assay:≥98%; Acidity (As malonic acid) ≤0.5%.
Chemical reagent analytical pure: Assay:≥99%; Acidity (As malonic acid) ≤0.05%.
Appearance: colorless liquid with a sweet ether odor.
Melting point:-50℃
Boiling point:199.3℃
Relative Density:1.0551
Refractive index:1.4135
Flash Point:100℃
Vapor Pressure: 0.344mmHg at 25°C

Solubility: misible with alcohol, ether, soluble in chloroform, benzene and other organic solvents. Slightly soluble in water. water solubility at 20 ℃ is 2.08g/100ml. 
Applications 
1. intermediate of organic synthesis, for the preparation of 2-amino-4, 6- dimethoxy-pyrimidine. Also used as a plasticizer for cellulose nitrate; 
2. widely used in the production of dyes, fragrances, sulfonylurea herbicides; is mainly used in the production of Propylene glycol ethoxymethylenemalonate, barbituric acid, alkyl diethyl malonate, then for the synthesis of pharmaceuticals, such as norfloxacin, lomefloxacin, chloroquine, phenylbutazone, etc., and synthetic dyes and pigments such as benzimidazolone type of organic pigments; 
3. as the for intermediates of drugs such as chloroquine, phenylbutazone, sulfadoxine-pyrimethamine and barbiturate; 
4．GB2760-96 provides the use of food flavor. Mainly used for the preparation of pear, apple, grape, cherry and other fruit flavors;