![]() Some compounds, such as cresols and PAHs, are partitioned between vapor and particulate phases.Ībout 85% of secondhand smoke is composed of sidestream smoke emerging from the burning tip of the cigarette and the remainder is exhaled in mainstream smoke (the smoke inhaled by a smoker when puffing on a cigarette) (Kritz et al., 1995). The particulate phase, “tar,” consists of thousands more chemicals, including alkaloids, larger PAHs, tobacco-specific nitrosamines, polonium-210, nickel, cadmium, arsenic, and lead. The gas phase consists of air, carbon dioxide, carbon monoxide, and many other chemicals, including nicotine, carbonyls (such as acetaldehyde, formaldehyde, and acrolein), hydrocarbons (such as benzene, toluene, and some polycyclic aromatic hydrocarbons ), nitrogen oxides, pyridine, ammonia, nitrosamines, and hydrogen cyanide (Cal EPA, 2005b). It consists of gases and volatile chemicals in which particulate matter (PM) is suspended. Cigarette smoke is a complex aerosol 2 consisting of thousands of chemicals (Cal EPA, 2005b). ![]()
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