Definition: Cassia oil is obtained by steam distillation of the leaves and young branches of Cinnamomum cassia Blume (C. aromaticum Nees).

• 本品为樟科植物肉桂Cinnamomum cassia Blume (C.；aromaticum Nees)的树叶和嫩枝经水蒸气蒸馏提取得到的挥发油。