NCIt definition : A yellow, oily liquid nitrosamine that solidifies at cold temperatures and emits toxic
fumes of nitrogen oxides when heated to decomposition. Nitrosonornicotine is found
in tobacco products and is likely produced by the nitrosation of nicotine during the
making and smoking of tobacco products. This substance is only used in research to
induce tumors in experimental animals. Exposure to nitrosonornicotine affects the
liver and nitrosonornicotine is reasonably anticipated to be a human carcinogen. (NCI05);