Melamine is an organic base and a trimer of cyanamide, with a 1,3,5 ... -triazine skeleton. Melamine is an organic base and a trimer of cyanamide, with a 1,3,5- ... . Like cyanamide, it contains 66% nitrogen by mass and, if mixed with resins, has fire retardant properties due to its ... release of nitrogen gas when burned or charred, and has ...