2 4 6 trichloro 1 3 5 triazine cas no July 8, 2019 16 32 64 128 2 4 6-trichloro-1 3 5-triazine 2 4 6 trichloroanisol Trichloro-1 3 5-triazine 2 4 6-tricyano-1 3 5-triazine