1,3,5-Triazine-2,4,6-triamine, N,N',N''-triethyl-, hemihydrate 16268-92-1 AI3-60345 EINECS 240-372-3 N,N',N''-Triethyl-1,3,5-triazine-2,4,6-triamine N2,N4,N6-TRIETHYLMELAMINE