Warm, sweet-anisic top note with a strong licorice character driven by trans-anethole, backed by a peppery, slightly camphoraceous herbal edge from fenchone. Bitter fennel is sharper and more medicinal than sweet fennel, with a green, slightly bitter herbaceous facet that lingers into the heart.AI · claude-opus-4-7
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Perfume and Flavor Materials of Natural Origin, page 160.
Bitter Fennel Oil from wild growing fennel herb is a yellowish to pale orange-brown, mobile liquid. Bitter fennel oil from cultivated bitter fennel is a pale yellow or almost colorless liquid.
Bitter Fennel Oil has a sharp peppery-camphoraceous odor and a spicy, faintly sweetish dryout note. The oil from cultivated bitter fennel has a somewhat sharp and warm-camphoraceous odor, initially earthy, but later on sweet, anisic and spicy.
Its flavor is distinctly bitter, slightly burning, but it tones out in a sweet aftertaste, still carrying, however, a warm-camphoraceous or earthy note.
The oil is frequently used as a masking agent, as a perfume ingredient in technical preparations, room sprays, insecticides, etc.
The oil finds some use in the flavoring of pickles, etc., but it is mostly used in the flavoring of liqueurs.
Bitter Fennel Oil from wild growing herb is steam distilled from the upper part of the plant when the fruits just begin to ripen. Bitter Fennel Oil from cultivated bitter fennel is steam distilled from the crushed seed (fruit) of the cultivated plant.