Angelica Root Oil is a water-white or pale yellow to orange-brown colored liquid. Its color and viscosity varies according to the root material used for distillation and according to the age of the oil. The main constituent is Phellandrene, a monoterpene of comparatively minor value in perfumes and flavors. It is responsible for the light, somewhat peppery topnote of oils from young roots. Beneath the peppery topnote grows a rich, somewhat herbaceous-earthy, woody body- note of unique tenacity and great diffusive power. The note is also slightly musky, animal-like with a spicy undertone. Various lactones, occurring in trace amounts in the oil, are held responsible for these special effects of the oil and for the synergistic effect it imparts to other perfume materials in compositions.
Arctander, Steffen . Perfume and Flavor Materials of Natural Origin (pp. 77-78).