Fettsyremetylester

Fettsyremetylester, commonly referred to in English as fatty acid methyl esters (FAME), are esters produced from fatty acids and methanol. They form a broad class of organic compounds that arise in fats and oils processing and renewable fuel technology. In industry they are primarily produced by transesterification of triglycerides (fats and oils) with methanol, using a catalyst such as sodium or potassium hydroxide, or an acid catalyst. The reaction yields fatty acid methyl esters and glycerol as a byproduct.

Fatty acid methyl esters are best known as the principal constituents of biodiesel, where they serve as a renewable substitute for diesel fuel. They are also used as solvents, lubricants, and plasticizers, and appear in some cosmetic and food-contact applications. In analytical chemistry, FAME are widely used as standards for gas chromatography and as a basis for fatty acid profiling in biological samples.

Properties of fettsyremetylester vary with the length and degree of unsaturation of the fatty acid chains. They are typically colorless to pale yellow liquids that are relatively nonpolar, with limited water solubility and good compatibility with organic solvents. Their physical properties, such as melting point and viscosity, depend on chain length and saturation.

Safety and environment: fatty acid methyl esters are generally biodegradable with low acute toxicity, but they are flammable and can pose risks if ingested or inhaled in concentrated form. Proper handling, storage, and disposal are advised, particularly in industrial settings.