Tonka Bean is used in perfumery and in flavoring tobacco and castor oil. The odor is very rich, sweet and warm, with prune, caramel undertones. Tonka Bean Oil contains coumarins that are used as an anti-coagulant. Tonka Bean Absolute has harmful warnings. Do not take internally. The bark and wood of the tree are odorless. The scent of Tonka Bean increases as it dries. USES Tonka bean oil is mainly used in bath soaks, perfumes and mists, as well as spa and massage.