The corresponding decomposition of a glyceride into an acid and glycerin takes place when the glyceride is distilled in superheated steam, or by boiling in water mixed with a suitable proportion of caustic potash or soda.
As to the detergent action of a soap, Berzelius held that it was due to the free alkali liberated with water; but it is difficult to see why a solution which has just thrown off most of its fatty acids should be disposed to take up even a glyceride, and, moreover, on this theory, weak cold solutions, in which the hydrolysis is considerable, should be the best cleansers, whilst experience points to the use of hot concentrated solutions.
STEARIC ACID, n-Octodecylic acid CH 3 (CH 2) 16 CO 2 H, an organic acid found as its glyceride stearin, mixed with palmitin and olefin, in most tallows (hence its name, from Gr.
PALMITIC ACID, n-Hexadecylic Acid, Ch3(Ch2)14c02h, an organic acid found as a glyceride, palmitin, in all animal fats, and partly as glyceride and partly uncombined in palm oil.
CH: CH [CH 2] 7 CO 2 H, an organic acid occurring as a glyceride, triolein, in nearly all fats, and in many oils - olive, almond, cod-liver, &c. (see Oils).
Linoleic acid, C18H3202, found as glyceride in drying oils, and ricinoleic acid, C18H33(OH)02, found as glyceride in castor oil, closely resemble oleic acid.