The abnormal proportions of di‐unsaturated glycerides in some pig deport fats

The insoluble azelaoglycerides from shark liver oil and pig depot fats contain about 2% each, on fat basis, of resinous monocarboxylic acids of mean M.W. 270–280 which give water soluble magnesium soaps. Those from chicken fat and depot fats of goat, sheep, cow and buffalo contain only 0.0% to 0.8% of this material. When this acid is estimated and corrected, all the above animal fats show proportions of di‐unsaturated glycerides equal to or lower than the Glyceride Type Distribution Rule values. The abnormal di‐unsaturated glyceride values earlier reported for various pig depot fats were apparently caused by presence of this impurity in varying amounts.