Overview
Malonic Acid Diethyl Ester, commonly known as Diethyl Malonate (DEM), is an organic compound belonging to the ester class. It is derived from malonic acid and ethanol, featuring a central methylene group flanked by two ester functionalities. This structure makes it a highly reactive intermediate in organic synthesis. The compound is widely recognized for its role in the pharmaceutical industry, particularly in the synthesis of barbiturates and other active pharmaceutical ingredients (APIs). Its versatility extends to agrochemicals and fragrance manufacturing, where it serves as a precursor for flavor and aroma compounds.
Physical and Chemical Properties
Diethyl Malonate is a colorless to pale yellow liquid with a characteristic ester-like odor. It has a density of 1.055 g/cm³ at 20°C and a boiling point of 199°C. The compound is highly soluble in common organic solvents like ethanol, ether, and benzene but only slightly soluble in water. Chemically, Diethyl Malonate is reactive due to its active methylene group, which can undergo nucleophilic substitution and condensation reactions. This property is exploited in the Knoevenagel condensation and Michael addition reactions, making it invaluable in synthetic organic chemistry. However, it is flammable and should be handled with care to avoid contact with strong oxidizers.
Main Applications
The primary application of Diethyl Malonate is in the pharmaceutical industry, where it is used to synthesize barbiturates, sedatives, and other therapeutic agents. Its role as a building block in organic synthesis is critical for producing compounds like vitamin B1 and certain antibiotics. In agrochemicals, DEM is utilized to manufacture pesticides and herbicides. The fragrance industry employs it to create esters that mimic fruity and floral scents. Additionally, it finds use in specialty chemicals and coatings, where its reactivity is leveraged to modify polymer properties.
Safety and Storage
Diethyl Malonate is classified as flammable and should be stored in tightly sealed containers away from heat sources and open flames. Proper ventilation is essential to prevent vapor accumulation, which can be hazardous if inhaled. Personal protective equipment (PPE), including gloves and goggles, is mandatory during handling to avoid skin and eye contact. In case of spills, absorb with inert material and dispose of following local regulations. Always refer to the Material Safety Data Sheet (MSDS) for detailed safety protocols.
B2B Procurement Guide
When procuring Diethyl Malonate, prioritize suppliers with certifications like ISO or GMP to ensure quality and consistency. Verify the purity level (typically >99%) through third-party testing if necessary. Packaging options range from small laboratory bottles to bulk drums, depending on volume requirements. Price negotiations should consider factors like order volume, delivery terms, and supplier reliability. For international shipments, ensure compliance with transportation regulations for flammable liquids. Long-term contracts may offer cost advantages for regular buyers.
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