Camphor () is a waxy, flammable, transparent solid with a strong aroma. It is a terpenoid with the chemical formula C10H16O. It is found in the wood of the camphor laurel (Cinnamomum camphora), a large evergreen tree found in East Asia, also of the unrelated kapur tree (Dryobalanops sp.), a tall timber tree from the same region. Camphor crystals are a white, crystalline substance with a strong odor commonly used in various applications. It is widely used in the production of medicines, such as cough suppressants, pain relievers, and anti-inflammatory drugs. Additionally, it is used as a flavoring agent in food and beverages, as well as in the manufacturing of cosmetics and personal care products. Camphor crystals are also used as a natural insect repellent and as a cleaning agent for household surfaces.