Camphor is a terpene in cannabis and is also found naturally in rosemary leaves, camphor weed, camphor basil, and the Kapur tree in South East Asia. It is used primarily for its scent such as in vapor rubs to treat chest congestion and can also be used as a stimulant to provide an uplifting feeling thought to improve focus. Camphor is also known to have antimicrobial and anesthetic properties.