Cassia is an evergreen tree growing to 7 m with a white aromatic bark and angular branches. The leaves are oblong-lancelate about 18 cm (7 in) long. Small yellow flowers hang from long stocks, and bloom in early summer. Cassia grows in hot, wet, tropical climates both wild and commercially. The stems are cut down when the bark is mature. The bark is removed in short lengths and dried, with some varieties rolling into quills.
Cassia Essential Oil has a pungent, warm scent. Cassia contains 1% to 2% volatile oil (cassia oil), which is mainly responsible for the spicy aroma.
Cassia Essential Oil has traditionally been used as a tonic, carminative and stimulant to treat nausea, flatulence and diarrhea. Chinese and Japanese scientists have found that Cassia's sedative effects lower high blood pressure and fever in experimental animals. The constituents of the oil have antiseptic properties, killing various types of bacteria and fungi.
Cautions: Cassia Oil is a dermal irritant, dermal sensitizer and a mucus membrane irritant and should be avoided in pregnancy.