Butane purchased at a hardware store often contains chemicals like benzene, which is known to cause cancer.
benzene causes cancer, thins the blood to cause symptoms resembling hemophilia, and damages fetuses exposed to it.
However studies have found dangerous compounds like benzene and formaldehyde in inhaled or secondhand vapor.
1835, benzine, altered from German Benzin, coined in 1833 by German chemist Eilhardt Mitscherlich (1794-1863) from Benz(oesäure) "benzoic acid" + -ene (German -in), hydrocarbon suffix. Mitscherlich obtained it from a distillation of benzoic acid, obtained from benzoin. The form benzene dates from 1872 in English. In 19c. it also sometimes was called benzol. Faraday was first to discover the compound (in fish oil) and called it bicarburet of hydrogen.
benzene ben·zene (běn'zēn', běn-zēn')
A clear, colorless, highly refractive flammable liquid derived from petroleum and used in or to manufacture a wide variety of chemical products, including DDT, insecticides, and motor fuels. Also called benzine.
A colorless flammable liquid derived from petroleum. Benzene is used to make detergents, insecticides, motor fuels, and many other chemical products. Chemical formula: C6H6. See more at benzene ring.