An incredibly powerful extract of the Barosma betulina herb, Buchu Oil Sulfur Fractions 40% have a strong sulfurous aroma. Pungent and catty, this extract is commonly used for “tropical” formulations alongside ingredients such as pineapple, passion fruit, and mango. Similar to Betulina leaf oil, Buchu Oil is used for fruity formulations and adds a bitter, slightly cooling contrast.