1,2,4-TRIAZOLE 116421-29-5 1H-1,2,4-Triazole 25167-73-1 27236-77-7 288-88-0 288-89-1 4H-1,2,4-Triazole (VAN) AI3-51031 EINECS 206-022-9 NSC 83128 TA s-Triazole