Comprehension this dual nature is important for creating safer options and responsibly regulating their use. Melamine is described to have an oral median lethal dose (LD50) of 3248 mg/kg depending on rat facts. It is also an irritant when inhaled or in contact with the pores and skin or eyes. https://www.tjcyindustrialchem.com/news/application-examples-of-melamine.html