Calamus oil, Nepal has a sweet lasting odor, warm, woody-spicy with increasingly sweet body-notes. Some experts compare the scent to dried milk or sweet leather but in my personal opinion it smells reminiscent of tapioca pudding. The main constituents are alpha and beta asarone at a combined total of up to 90%. Although calamus has been used since Biblical times beta-asarone is now considered to be a carcinogen and caution should be used with this oil. The Acorus Calamus is a perennial plant known in the lower 48 as "Sweet Flag," "Sweet Root," "Sweet Myrtle," and "Sweet Cinnamon."