Context: A total of 32 essential oils and resins were added individually to experimental cigarettes.
Objective: A battery of tests was used to compare the toxicity of mainstream smoke from these experimental cigarettes. The lowest target inclusion level was 100 ppm and the highest was 100,000 ppm.
Context: Two ammonia compounds, diammonium phosphate and ammonium hydroxide, are typically used in the processing or flavoring of tobacco used in the manufacture of cigarettes.
Objective: A battery of tests was used to compare the toxicity of mainstream smoke from experimental cigarettes containing different added levels of diammonium phosphate (target maximal inclusion level, 50,000 ppm) or both ammonium hydroxide (target maximal inclusion level 11,160 ppm) and diammonium phosphate.
Materials And Methods: The tests included analytical chemistry, with over 40 constituents in mainstream cigarette smoke; in vitro bacterial (Salmonella) mutagenicity and cytotoxicity (neutral red uptake) assays, and 90-day smoke inhalation studies using rats.
Context: Aromatic carbonyls are typically used in the processing or flavoring of tobacco used in the manufacture of cigarettes.
Objective: A battery of tests was used to compare the toxicity of mainstream smoke from experimental cigarettes containing different added levels of aromatic carbonyl compounds.
Materials And Methods: Ten aromatic carbonyl compounds, nine of which have been reported in tobacco or in tobacco smoke, were added individually to experimental cigarettes at three different levels.