Besides the fact that it rhymes, it was never stated which apple do we like to eat, does it a bright red wax coated or ungloss fresh/natural one? Morpholine is a common solvent and emulsifier to give an “attractive look” to fruits/vegetables to help them last longer and remains shiny and fresh even during prolonged transit. Morpholine alone does pose a health risk but when it combines with atmospheric and dietary nitrates, it forms the potent carcinogen N-nitrosomorpholine (NMOR). Excessive formation of NMOR can cause multiple primary neoplasms in the respiratory, upper digestive tracts, and liver.