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Camphor (/ ˈ k æ m f ər /) is a waxy, colorless solid with a strong aroma. [5] It is classified as a terpenoid and a cyclic ketone.It is found in the wood of the camphor laurel (Cinnamomum camphora), a large evergreen tree found in East Asia; and in the kapur tree (Dryobalanops sp.), a tall timber tree from South East Asia.
In 1821, John Kidd cited these two disclosures and then described many of this substance's properties and the means of its production. He proposed the name naphthaline , as it had been derived from a kind of naphtha (a broad term encompassing any volatile, flammable liquid hydrocarbon mixture, including coal tar). [ 16 ]
Camphoric acid, C 10 H 16 O 4 [citation needed] or in Latin form Acidum camphoricum, is a white crystallisable substance obtained from the oxidation of camphor. It exists in three optically different forms; the dextrorotatory one is obtained by the oxidation of dextrorotatory camphor and is used in pharmaceuticals .
Camphor is also used as a moth repellent, particularly in China. [17] Unlike naphthalene and dichlorobenzene, camphor has medicinal applications and is not regarded as a carcinogen, though it is toxic in large doses. Red cedar wood and oil is also used as an alternative moth repellent. [18]
Camphora officinarum grows up to 20–30 m (66–98 ft) tall. [4] In Japan, where the tree is called kusunoki, five camphor trees are known with a trunk circumference above 20 m (66 ft), with the largest individual, Kamō no Ōkusu (蒲生の大楠, "Great camphor of Kamō"), reaching 24.22 m (79 + 1 ⁄ 2 ft).
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Well-known terpenoids include citral, menthol, camphor, salvinorin A in the plant Salvia divinorum, ginkgolide and bilobalide found in Ginkgo biloba and the cannabinoids found in cannabis. The provitamin beta carotene is a terpene derivative called a carotenoid.