are only slightly sensitive: LD50 > 3 000 mg/kg (Lide, 2005).
For the total content of melamine and its analogs, the tolerated
daily intake is reported to be 0.5 mg/kg of body weight.
Melamine is absorbed through the digestive tract and when
inhaled it is irritating to skin and eye mucous membranes.
Acute toxicity leads to acute renal failure. Chronic toxicity is
manifested by the formation of urinary stones in kidneys or
bladders. There is a suspicion that there are negative effects
of melamine on the reproduction system and carcinogenic
effects, esp. at high doses.