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Among the 250 known harmful chemicals in tobacco smoke, at least 69 can cause cancer." [7] [2] [8] [9] See: Health effects of tobacco smoking and List of cigarette smoke carcinogens. Although many of these additives are used in making cigarettes, each cigarette does not contain all of these additives.
Typical tobacco packaging warning message about the health effect of smoking tobacco The front of a 20 pack of Marlboro Red cigarettes sold in New Zealand. Brazil's third batch of graphic images (since replaced), mandatory on all cigarette packs. Philippines. Graphic tobacco packaging warning messages from 2016 to 2018.
Cigarette companies in the United States, when prompted to give tar/nicotine ratings for cigarettes, usually use "tar", in quotation marks, to indicate that it is not the road surface component. Tar is occasionally referred to as an acronym for total aerosol residue , [ 3 ] a backronym coined in the mid-1960s.
This is an accepted version of this page This is the latest accepted revision, reviewed on 7 January 2025. Circumstances, mechanisms, and factors of tobacco consumption on human health "Health effects of smoking" and "Dangers of smoking" redirect here. For cannabis, see Effects of cannabis. For smoking crack cocaine, see Crack cocaine § Health issues. "Smoking and health" redirects here. For ...
Temperatures in burning cigarettes range from about 400 °C between puffs to about 900 °C during a puff. During the burning of the cigarette tobacco (itself a complex mixture), thousands of chemical substances are generated by combustion, distillation, pyrolysis and pyrosynthesis. [1] [2] Tobacco smoke is used as a fumigant and inhalant.
When studying the environmental effects of cigarette filters, the various chemicals that can be found in cigarette filters are not studied individually, due to the complexity of doing so. Researchers instead focus on the whole cigarette filter and its LD 50. LD 50 is defined as the lethal dose that kills 50% of a sample population. This allows ...
Nicotine has been used as an insecticide since at least 1690, in the form of tobacco extracts or as pure nicotine sulphate [19] [51] [52] (although other components of tobacco also seem to have pesticide effects). [53] It acts on the nicotinic acetylcholine receptor, and gave the receptor its name. Nicotine is in IRAC group 4B.
The tobacco-specific nitrosamines are present in cigarette smoke and to a lesser degree in "smokeless" tobacco products such as dipping tobacco and chewing tobacco; additional information has shown that trace amounts of NNN and NNK have been detected in e-cigarettes. [3] They are present in trace amounts in snus. They are important carcinogens ...