설명(영) |
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Amides are compounds which exhibit the structure RCO-NXY, where RCO- commonly denotes a Carboxylic Acid or a Fatty Acid radical. X and Y may be H or any alkyl or aromatic radical; X and Y may be the same or different. The amide structure may be part of a heterocyclic ring, as in PCA. R can also represent a nitrogen atom, as in Urea. Amides are hydrolyzable derivatives of carboxylic acids and are prepared via a number of synthetic and biological routes. A typical representative includes Cocamide. Alkanolamides are a special group of amides in which the amide nitrogen carries a hydroxyl-substituted alkyl group. Amides and Alkanolamides can be further reacted with alkylene oxides to form Alkoxylated Amides. Acylated amino acids are included in the listing of Amino Acids.
Amides have a number of applications in cosmetics. These include use as moisturizers, preservatives, surfactants, and foam boosters. |