605 Jatropha Seed Industrial It is a source of oil that is traditionally used for soap production and as a source of energy. The oil-rich seeds and seed oil are used as purgative and to expel internal parasites, although their application often leads to strong irritation of the gastro-intestinal tract or even poisoning. The oil is used as an ingredient of hair conditioners. Traditionally, it is used for the manufacture of candles and soap. 8,017