Overview
Tetramethylurea (TMU) is a versatile polar aprotic solvent with the chemical formula C5H12N2O. It is characterized by its high solvency power, thermal stability, and miscibility with a wide range of organic and inorganic compounds. TMU is commonly used in organic synthesis, pharmaceuticals, and polymer industries due to its ability to dissolve both polar and non-polar substances. First synthesized in the mid-20th century, TMU has gained prominence in industrial applications for its unique properties. It is particularly valued in reactions requiring high-temperature stability and low nucleophilicity, making it a preferred choice for specialized chemical processes.
Physical and Chemical Properties
TMU is a colorless to pale yellow liquid with a density of 0.968 g/cm³ at 20°C. It has a melting point of -1.2°C and a boiling point of 177°C, which makes it suitable for high-temperature applications. The compound is miscible with water and most organic solvents, including alcohols, ethers, and chlorinated hydrocarbons. One of the key properties of TMU is its high polarity, which enables it to dissolve a wide range of solutes. It is also thermally stable, non-corrosive, and relatively inert under normal conditions. These properties make it an ideal solvent for reactions involving strong bases or high temperatures.
Main Applications
TMU is widely used as a solvent in organic synthesis, particularly in reactions involving Grignard reagents, organolithium compounds, and other highly reactive species. Its ability to stabilize reactive intermediates makes it invaluable in pharmaceutical manufacturing, where it is used to produce active pharmaceutical ingredients (APIs). In the polymer industry, TMU serves as a solvent for polyacrylonitrile and other synthetic fibers. It is also employed in the production of specialty chemicals, such as dyes and pigments, due to its excellent solvency power. Additionally, TMU finds use in analytical chemistry as a mobile phase in chromatography.
Safety and Storage
TMU is classified as an irritant and can cause skin and eye irritation upon contact. Proper personal protective equipment (PPE), including gloves and goggles, should be worn when handling this chemical. Inhalation of vapors should be avoided, and work should be conducted in a well-ventilated area or under a fume hood. Storage conditions for TMU include keeping the compound in a cool, dry place away from heat sources and open flames. Containers should be tightly sealed to prevent moisture absorption and contamination. In case of spills, absorb the liquid with an inert material and dispose of it according to local regulations.
B2B Procurement Guide
When procuring TMU for industrial use, it is essential to verify the purity of the product, which should typically be ≥99%. Packaging options include sealed drums or intermediate bulk containers (IBCs), depending on the required quantity. Buyers should also check for supplier certifications, such as ISO or GMP compliance, to ensure quality and reliability. Price ranges for TMU vary depending on purity, packaging, and supplier. Bulk purchases often attract discounts, but buyers should balance cost considerations with quality assurance. It is advisable to request samples and conduct quality tests before committing to large orders. Additionally, consider the supplier's logistics capabilities and lead times to avoid disruptions in supply.
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