Also known as 4-nitrosomorpholine, it is a strong animal carcinogen and morpholine is known to be N-nitrosatable in vivo, morpholine is present in a sample of loose-leaf chewing tobacco, which was packaged in an aluminum pouch indicates that there are other conceivable sources of morpholine contamination in processed tobacco.
Additional information on CAS 59-89-2
Brunnemann, Klaus D., et al. “N-Nitrosomorpholine and Other Volatile N-Nitrosamines in Snuff Tobacco.” Carcinogenesis, vol. 3, no. 6, 1982, pp. 693–96, https://doi.org/10.1093/carcin/3.6.693.?
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