Quillaja (quillaia) Saponaria Extract Introduction  Quillaja (quillaia) extract raw material is an ingredient made from the concentrated purified extract of the outer cambium layer of the Quillaja Saponaria Molina tree, commonly identified as quillay bark, or soap bark, native to Chile. Quillaja Extract Powder is a perfect raw material for use in foods, beverages, specialized confections, natural vegetable/fruit washes, soaps …