Violet Leaf Absolute

Chemical properties

Violet leaf absolute is obtained by solvent extraction, via the concrete, from the leaves of Viola odorata L. (Violaceae). It is produced in small quantities, for example, in Egypt.
Theabsolute is a dark green to brown liquid with a strong, green odor.Themain constituent of the volatile fraction is (2E,6Z)-2,6-nonadienal (violet leaf aldehyde).
Violet leaf absolute is used frequently in perfume compositions, but only in very low concentration because of its intense odor.

Chemical properties

Violet leaf absolute is produced by petroleum extraction of the freshly harvested leaves. Further alcohol washing, chilling and filtration of the alcohol extracts and subsequent evaporation in a vacuum results in the absolute. The absolute has a very powerful and characteristic odor. Also see Violet.

Occurrence

Reported found in violet leaves.

Definition

Extractives and their physically modified derivatives. Viola odorata, Violaceae.

Taste threshold values

Taste characteristics at 10 ppm: green, melon, floral, fresh, waxy, grassy and leafy.

Pharmacology

A simple extract from violet herbage administered as a decoction (10 ml/kg body weight) orally or sc to rats following experimentally induced inflammation showed a favourable anti-inflammatory effect in acute and subacute (8-10-day) experiments (Kroutil & Kroutilova, 1968).