PbCN2.

The lead(2+) cation and the cyanamide NCN(2-) anion.

it can be calcium cyanamide or can be a mixture of C and CaCN2.

Cyanide, Cyanic, Cyanamide, Cyanuric, Cyanogen, Cyanosis

Melamine is an organic base and a trimmer of cyanamide, with a1 3 5 triazine skeleton. Like cyanamide, it contains 67% nitrogenby mass and, if mixed with resins, hasfire retardant properties due to its release of nitrogen gas when burned or charred, and has several other industrial uses.

William Hugh Kipp has written:

'Condensation reactions of cyanamide' -- subject(s): Cyanamid