3-Chloromethyl-1,2,4-triazolin-5-one (CAS NO.252742-72-6) is also named as 3H-1,2,4-triazol-3-one, 5-(chloromethyl)-1,2-dihydro- ; 3H-1,2,4-triazol-3-one, 5-(chloromethyl)-2,4-dihydro- ; 5-(Chloromethyl)-1,2-dihydro-3H-1,2,4-triazol-3-one ; 5-(Chloromethyl)-2,4-dihydro-3H-1,2,4-triazol-3-one ; 3-(chloromethyl)-1H-1,2,4-triazol-5(4H)-one ; 5-Chloromethyl-2,4-dihydro-[1,2,4]triazol-3-one .