Many nitrosamines have been patented as gasoline and lubricating oil additives, antioxidants and pesticides. N- nitrosodimethylamine (DMNA) is mainly used for electrolytic production of two-component rocket fuel 1, 1- dimethylhydrazine. Other practical aspects include the control of nematodes, the inhibition of soil nitrification, the plasticizer of acrylonitrile polymer, the preparation of thiocarbyl fluoride polymer and its application in rubber plasticization.
Nitrosamines exist in synthetic cutting oil, semi-synthetic cutting oil and soluble cutting oil, or as pollutants of amines or as reaction products between amines and nitrite. It is found that the concentration range of nitrosamines in some synthetic cutting oils is 1 ~ 1000 ppm.
It is reported that soil contains a lot of nitrosamines (which are thought to be produced by applying triazine herbicides that can combine with nitrogen fertilizer), and N- nitrosodimethylamine can be absorbed and leached by plants.
It is found in the United States that about 30 kinds of cosmetics (such as emollients, hand sanitizers, body washes and shampoos) contain 65,438+000ppb (65,438+0 ng/g) to as high as 48,000 ppb of N- dinitrdimethylamine. The discovered N- nitroso compounds may be due to nitrosation of diethanolamine and/or triethanolamine emulsifier by nitrite compounds.
Salted products such as meat, fish and vegetables, especially when pickled and colored with nitrate or nitrite, often produce nitrosamines, and the content often ranges from several micrograms per kilogram to dozens of milligrams per kilogram.