An oily, volatile unsaturated hydrocarbon (C5H8), obtained by the distillation of caoutchouc or gutta-percha, and used to make synthetic rubber by polymerization. In organic chemistry, it is viewed conceptually as the building block of the terpene series of hydrocarbons.
Unsaturated hydrocarbon (CH2 C(CH3 )CHCH2 ) part of isoprene rubber, IR and butyl rubber, IIR.
Organic compound, formula C5H8; 2–methyl–1,3–butadiene; it is the major hydrocarbon emitted by vegetation, particularly members of the oak genus. Emission rates depend on the leaf temperature and availability of sunlight. Isoprene is very reactive with the hydroxyl radical and with ozone, and its reactivity is thought to contribute to high levels of ozone found over the rural southeastern United States and other areas.