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Melting Points of Fatty Acid Amides

Regardless of the carbon number, the melting point of saturated fatty acid amides falls in a range of 100 to 110C. In contrast, the melting point of unsaturated fatty acid amides is significantly affected by the carbon number of such fatty acid amides; their melting points fall in a range of 70 to 85C relative to the carbon number in a range of 18 to 22. Usually, as a lubricant, a fatty acid amide whose carbon number is in a range of 18 to 22 is used.