Search for new industrial oils. III. Oils from compositae

Summary Screening analyses of oils from seeds of 16 species of the Compositae family reveal numerous indications of unusual component fatty acids or interferences with the application of standard methods. Epoxyoleic acid is indicated in amounts from 1% to 67%. Conjugated dienes equivalent to 5% to 48% of C 18 acid appear in four oils. Hydroxyl groups are found in two oils in amounts corresponding to 20% and 70% of a C 18 acid. Of special interest is the oil from Dimorphotheca aurantiaca , which appears to contain some 50% of an acid with both an hydroxyl group and conjugated diene. Oil from Rudbeckia bicolor var. superba contains 76% of apparent linoleic acid and may rank among the richest sources of this acid.