4-(N-Nitrosomethylamino)-1-(3-pyridyl)1-butanone (NNK)

NNK is one of the most potent cancer-causing chemicals present in tobacco and tobacco smoke. Trace amounts are present in green tobacco leaves. Larger amounts are present in cured and aged tobacco and in tobacco smoke.

Listed as Causing


Cancer: 04/01/1990
Basis for Listing AB-IARC

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